JAMB 2024 Physics Questions & Answers, Topics to Read & Repeated Questions

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Physics exam is an important core science subject that no jamb science candidate should toy with. So today we will be discussing on Jamb questions and answers for physics.

We all know that every candidate will love to know what jamb is going to set in physics, this is why we are bring this jamb physics questions and answers to your door step. We believe it will assist you to blast physics and come out in outstanding colors.

The joint admission and Matriculation board jamb is the only body backed by the law that helps universities, polytechnics, college of education and other her institution to conduct an entrance exam.

If you are interested in scoring high score in JAMB physics 2024 then you need to consider going through all we are going through all our articles we have written for all physics candidates.

Some key point that are useful for JAMB Physics 2024

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Memorise your formula: formula in any calculative subject helps you to get the answers to most questions that involves calculation with speed of light. If you eventually forget any formula and the question comes out on it, it will be difficult to answer that question.
Remember the definition all laws and theories: you must have heard of Hooke’s law, Einstein’s special theory of relativity etc, they are many and can easy be found on your physics text books. Understanding these laws, theories and it application will go a long way to help you.
Note all all important dates: physics is a science and in all science subjects there are notable people who discover or invented something, do your best to remember all these discovery and their dates. Jamb is notorious when it comes to setting of questions that deals on date.

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Reliability : if expo is reliable in jamb Physics 2024 unlike before then there won’t be much mass failure. Depending on expo might be disastrous
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JAMB 2024 Physics Questions & Answers, Topics to Read & Repeated Questions

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The inner diameter of a test tube can be measured accurately using a

A. micrometer screw guage
B. pair of dividers
C. metre rule
D. pair of vernier calipers

Two bodies have masses in the ratio 3:1. They experience forces which impart to them acceleration in the ratio 2:9 respectively. Find the ratio of forces the masses experienced.

A. 1 : 4
B. 2 : 1
C. 2 : 3
D. 2 : 5

Particles of mass 10^-2kg is fixed to the tip of a fan blade which rotates with angular velocity of 100rad-1. If the radius of the blade is 0.2m, the centripetal force is

A. 2 N
B. 20 N
C. 200 N
D. 400 N

A lead bullet of mass 0.05kg is fired with a velocity of 200ms $^{- 1}$

into a lead block of mass 0.95kg. Given that the lead block can move freely, the final kinetic energy after impact is

A. 50 J
B. 100 J
C. 150 J
D. 200 J

A ball of mass 0.1kg is thrown vertically upwards with a speed of 10ms-1 from the top of a tower 10m high. Neglecting air resistance, its total energy just before hitting the ground is

(take g = 10ms-2)

A. 5 J
B. 10 J
C. 15 J
D. 20 J

A car of mass 800kg attains a speed of 25m/s in 20 secs. The power developed in the engine is

A. 1 . 25 x 10⁴ W
B. 2 . 50 x 10⁴ W
C. 1 . 25 x 10⁶W
D. 2 . 50 x 10⁶ W

When the brakes in a car are applied, the frictional force force on the tyres is

A. is a disadvantage because it is in the direction of the motion of the car
B. is a disadvantage because it is in the opposite direction of the motion of the car
C. is an advantage because it is in the direction of the motion of the car
D. is an advantage because it is in the opposite direction of the motion of the car

If the stress on a wire is 10⁷NM^-2 and the wire is stretched from its original length of 10.00 cm to 10.05 cm. The young’s modulus of the wire is

A. 5 . 0 x 10⁴ Nm^-2
B. 5 . 0 x 10⁵ Nm^-2
C. 2 . 0 x 10⁸ Nm^-2
D. 2 . 0 x 10⁹ Nm^-2

A solid weigh 10 .00 N in air, 6 N when fully immersed in water and 7 . 0 N when fully immersed in a liquid X. Calculate the relative density of the liquid, X.

A. 5/3
B. 4/3
C. 3/4
D. 7/10

When temperature of a liquid increases, its surface tension

A. Decreases
B. Increases
C. Remain Constant
D. Increases then decreases

A gas at a volume of V₀ in a container at pressure P₀ is compressed to one-fifth of its volume. What will be its pressure if the magnitude of its original temperature T is constant?

A. P₀/5
B. 4P₀/5
C. P₀
D. 5P₀

A piece of substance of specific head capacity 450JKg^-1K^-1 falls through a vertical distance of 20m from rest. Calculate the rise in temperature of the substance on hitting the ground when all its energies are converted into heat. [g = 10ms^-2]

A. 2/9°C
B. 4/9°C
C. 9/4°C
D. 9/2°C

I. A liquid boils when its saturated vapour pressure is equal to the external pressure
II. Dissolved substances in pure water lead to increase in the boiling point.
III. When the external pressure is increased, the boiling point increases.
IV. Dissolved substances in pure water decrease the boiling point.Which combination of the above are peculiarities of the boiling point of a liquid?

A. I, II and III
B. I, II, III and IV
C. I, II and IV
D. II, III and IV

The temperature gradient across a copper rod of thickness 0.02m, maintained at two temperature junctions of 20°C and 80°C respectively is

A. 3.0 x 10²Km^-1
B. 3.0 x 10³Km^-1
C. 5.0 x 10³Km^-1
D. 3.0 x 10⁴Km^-1

Calculate the mass of ice that would melt when 2kg of copper is quickly transferred from boiling water to a block of ice without heat loss;
Specific heat capacity of copper = 400JKg^-1K^-1
Latent heat of fusion of ice = 3.3 x 10⁵JKg^-1

A. 8/33kg
B. 33/80kg
C. 80/33kg
D. 33/8kg

The equation of a wave travelling along the positive x-direction is given by;
y = 0.25 x 10^-3 sin (500t – 0.025x).
Determine the angular frequency of the wave motion.

A. 0.25 x 10^-3rad s^-1
B. 0.25 x 10^-1rad s^-1
C. 5.00 x 10²rad s^-1
D. 2.50 x 10³rad s^-1

If a sound wave goes from a cold air region to a hot air region, its wavelength will

A. increase
B. decrease
C. decrease then increase
D. remain constant

The lowest note emitted by a stretched string has a frequency of 40Hz. How many overtones are there between 40hz and 180Hz?

A. 4
B. 3
C. 2
D. 1

A man stands 4m in front of a plane mirror. If the mirror is moved 1m towards the man, the distance between him and his new image is

A. 3m
B. 5m
C. 6m
D. 10m

The inside portion of part of a hollow metal sphere of diameter 20cm is polished. The portion will therefore form a

A. concave mirror of focal length 5cm
B. concave mirror of focal length 10cm
C. convex mirror of focal length 5cm
D. convex mirror of focal length 20cm

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The velocities of light in air and glass are 3.0 x 10⁸ms^-1 and 2.0 x 10⁸ms^-1 respectively. If the angle of refraction is 30°, the sine of the angle of incidence is

A. 0.33
B. 0.50
C. 0.67
D. 0.75

An astronomical telescope is said to be in normal adjustment when the

A. eye is accommodated
B. focal length of objective lens is longer than that of eye piece
C. final image is at the near point of eye
D. final image is at infinity

Which of the following electromagnetic waves is least energetic?

A. Infra-red rays
B. X-rays
C. Ultra-violet rays
D. Gamma rays

Steel is more suitable for permanent magnet than iron because the former

A. is easily demagnetized by shaing vigorously
B. is an alloy of many metals
C. is easily magnetized by alternating current through one cycle
D. retains magnetism more than iron

Four cells each of e.m.f 1.5V and internal resistance of 4Ω are connected in parallel. What is the effective e.m.f. and internal resistance of the combination?

A. 6.0V, 16Ω
B. 6.0V, 1Ω
C. 1.5V, 4Ω
D. 1.5V, 1Ω

A 3000W electric cooker is to be used on a 200V mains circuit. Which of the fuses below can be used safely with the cooker?

A. 2A
B. 5A
C. 10A
D. 20A

A galvanometer has a resistance of 5Ω. By using a shunt wire of resistance 0.05Ω, the galvanometer could be converted to an ammeter capable of reading 2Amp. What is the current through the galvanometer?

A. 2mA
B. 10mA
C. 20mA
D. 25mA

In fleming’s right-hand rule, the thumb, the forefinger and the middle finger if held mutually at right angles represent respectively, the

A. motion, the field and the induced current
B. induced current, the motion and the field
C. field, the induced current and the motion
D. induced current, the field and the motion

At what frequency would a 10H inductor have a reactance of 2000Ω?

A. π/200Hz
B. π/100Hz
C. 100/πHz
D. 100πHz

The core of an efficient transformer should consist of laminated pieces of metal in order to

A. increase the heat produced by increasing the eddy current
B. increase the heat produced by reducing the eddy current
C. reduce the heat produced by increasing the eddy current
D. reduce the heat produced by reducing the eddy current

Gamma rays are produced when

A. high velocity electrons are abruptly stopped in metals
B. energy changes occur within the nucleus of atoms
C. energy changes occur within the electronic structure of atoms
D. electrons are deflected in very strong magnetic fields

What is the speed of a particle of mass 10^-27kg whose wavelength is 10^-8m.

[h = 6.63 x 10^-34Js]

A. 6.63ms^-1
B. 66.30ms^-1
C. 663.00ms^-1
D. 6630.00ms^-1

in a series R-L-C circuit at resonance, the voltages across the resistor and the inductor are 30V and 40V respectively, what is the voltage across the capacitor?

A. 30V
B. 40V
C. 50V
D. 70V

In the Rutherford scattering experiment, a beam of alpha particles was fired at a thin gold film with some of the particles being considerably deflected. This shows that

A. a gold nucleus contains protons, neutrons and electrons uniformly distributed in a tiny volume
B. the gold nucleus is positively charged and is concentrated in a tiny volume
C. the gold nucleus emitted alpha particles
D. the gold nucleus is concentrated in a tiny volume and contains alpha particles

²³₁₁Na + Proton → ^p_qX + alpha particle
What are the values of p and q respectively in the equation above?

A. 10 and 20
B. 12 and 24
C. 20 and 10
D. 24 and 12

A semiconductor diode is used in rectifying alternating current into direct current mainly because it

A. allows current to flow in either direction
B. is non-linear
C. offers a high input resistance
D. allows current to flow only in one direction

if ∆x is the uncertainty in the measurement of the position of a particle along the x-axis and ∆P_x is the uncertainty in the measurement of the linear momentum along the x-axis, then the uncertainty principle relation is given as

A. ∆x ∆P_x ≥ h
B. ∆x ∆P_x = 0
C. ∆x ∆P_x < h
D. ∆x ∆P_x = ∞

When a ship sails from salt water into fresh water, the fraction of its volume above the water surface will

A. increase
B. decrease
C. remain the same
D. increase then decrease

I. Its velocity is constant
II. No work is done on the body
III. It has constant acceleration directed away from the centre
IV. The centripetal force is directed towards the centreWhich combination of the above is true of a body moving with constant speed in a circular track?

A. II and IV
B. I and IV
C. II and III
D. I and III

The velocity ratio of a machine is 5 and its efficiency is 75%. What effort would be needed to lift a load of 150N with the machine?

A. 20N
B. 30N
C. 40N
D. 50N

At a fixed point below a liquid surface, the pressure downwards is P1 and pressure upwards is P2. It can be deduced that

A. P₁ > P₂
B. P₁ ≥ P₂
C. P₁ < P₂
D. P₁ = P₂

If the force and the velocity on a system are each reduced simultaneously by half, the power of the system is

A. doubled
B. reduced to a quarter
C. reduced by half
D. constant

A catapult used to hold a stone of mass 500g is extended by 20cm with an applied force F. If the stone leaves with a velocity of 40m/s, the value of F is

A. 4.0 x 10²N
B. 2.0 x 10³N
C. 4.0 x 10³N
D. 4.0 x 10⁴N

A stream is flowing at 0.75ms $^{- 1}$

and a boat heading perpendicular for the stream landed at the opposite bank at an angle of 30°. Calculate the velocity of the boat.

A. 1.50ms^-1
B. 1.00ms^-1
C. 0.86ms^-1
D. 0.65ms^-1

A rope is being used to pull a mass of 10kg vertically upward. Determine the tension in the rope if, starting from rest, the mass acquires a velocity of 4ms $^{- 1}$

in 8s [g = 10ms $^{- 2}$

]

A. 5N
B. 50N
C. 95N
D. 105N

I. The frictional force is independent of the area of the surfaces in conduct
II. The frictional force depends on the nature of the surfaces in contact
III. The frictional force depends on the speed of sliding
IV. The frictional force is directly proportional to the normal reaction.Which combination of the above is true of sliding friction?

A. I, III and IV
B. I, II and IV
C. I, II and III
D. II, III and IV

Total internal reflection occurs when light moves from

A. a dense medium to a less dense medium
B. air to water
C. water to glass
D. a less dense to a dense medium

A quantity of water at 0°C is heated to about 30°C. At each degree rise in temperature, its density will

A. rise steadily
B. fall steadily
C. fall then rise
D. rise then fall

I. Coherence
II. Same frequency
III. Same wavelength
IV. Same IntensityWhich of the conditions above are necessary to produce interference fringes?

A. I and III
B. I, II and IV
C. I, II and III
D. II and III

A boy observes a piece of stone at the bottom of a river 6.0m deep. If he looks from the surface of the river, what is the apparent distance of the stone from him? [Refractive Index of Water = 4/3]

A. 8.0m
B. 5.5m
C. 5.0m
D. 4.5m

A thin wire with heavy weights attached to both ends is hung over a block of ice resting on two supports. If the wire cuts through the ice block while the block remains solid behind the wire, the process is called

A. condensation
B. sublimation
C. regelation
D. fusion

Dry
Day 1 – 30°C | Day 2 – 29°C | Day 3 – 25°C

Wet
Day 1 – 22°C | Day 2 – 22°C | Day 3 – 21°C

The reading above are for three consecutive days from a wet and dry bulb hygrometer. It can be concluded that the relative humidity for the three days

A. decreased steadily
B. remained unchanged
C. increased steadily
D. was least on Day 1

One end of a long wire is fixed while a vibrator is attached to the other end. When the vibrator is energized, the types of waves generated in the wire are

A. stationary and longitudinal
B. stationary and transverse
C. progressive and transverse
D. progressive and longitudinal

A metal of mass 0.5kg is heated to 100°C and then transferred to a well-lagged calorimeter of heat capacity 80JK^-1 containing water of heat capacity 420JK^-1 at 15°C. If the final steady temperature of the mixture is 25°C, find the specific heat capacity of the metal.

A. 877Jkg^-1K^-1
B. 286Jkg^-1K^-1
C. 133Jkg^-1K^-1
D. 92Jkg^-1K^-1

The main reason for making the cover of a vacuum flask airtight is to prevent heat loss by

A. convection
B. conduction
C. radiation
D. evaporation

A radio is operated by eight cells each of e.m.f. 2.0V connected in series. If two of the cells are wrongly connected, the net e.m.f. of the radio is

A. 8V
B. 10V
C. 12V
D. 16V

If a charged ion goes through combined electric and magnetic fields, the resultant emergent velocity of the ion is

A. E/B
B. EB
C. B/E
D. E – B

A projection lantern is used to give the image of a slide on a screen. If the image is 24 times as large as the slide and the screen is 72.0m from the projecting lens, what is the position of the slide from the lens?

A. 0.3m
B. 3.0m
C. 3.5m
D. 4.0m

An electron of charge 1.6 x 10^-19C and mass 9.1 x 10^-31kg is accelerated between two metal plates with a velocity of 4 x 10⁷ms^-1, the potential difference between the plates is

A. 4.55 x 10³V
B. 4.55 x 10²V
C. 9.10 x 10¹V
D. 4.55 x 10¹V

A cell of internal resistance 0.01Ω can be measured accurately using the

A. Ohm meter
B. metre bridge
C. potentiometer
D. electroscope

What optical instrument can best be constructed with converging lenses of focal lengths 50cm and 5cm?

A. Compound microscope
B. Galileo’s telescope
C. Terrestrial telescope
D. Astronomical telescope

in a pure semiconductor, the number of electrons in the conduction band is

A. less than the number of holes in the valence band
B. equal to the number of holes in the valence band
C. greater than the number of holes in the valence band
D. twice the number of holes in the valence band

In a thermonuclear reaction, the total initial mass is 5.02 x $10^{- 27}$

kg and the total final mass is 5.01 x $10^{- 27}$ kg. The energy released in the process is
[c = 3.0 x $10^{8}$

ms-1]

A. 9.0 x 10^-13J
B. 9.0 x 10^-12J
C. 9.0 x 10^-11J
D. 9.0 x 10^-10J

A gas would serve as an electrical conductor under

A. reduced pressure and high current
B. increased magnetic field
C. reduced pressure and reduced potential
D. exposure to visible light

If ∆x is the uncertainty in the measurement of the position of a particle along the x-axis and ∆P_a is the uncertainty in the measurement of the linear momentum along the x-axis, then the uncertainty principle relation is given as

A. ∆x ∆P_x ≥ h
B. ∆x ∆P_x = 0
C. ∆x ∆P_x < h
D. ∆x ∆P_x = ∞

An electric generator with a power output of 3.0KW at a voltage of 1.5KV distributes power along cables of resistance 20.0Ω. The power loss in the cables is

A. 80.0W
B. 40.0W
C. 10.0W
D. 0.1W

If the frequency of an emitted x-ray is 1.6 x 10¹⁶Hz, the accelerating potential is?
[e = 1.6 x 10^-19C, h = 6.63 x 10^-34Js]

A. 6630.0V
B. 663.0V
C. 66.3V
D. 6.6V

If the fraction of the atoms of a radioactive material left after 120years is 1/64, what is the half-life of the material?

A. 24 years
B. 20 years
C. 10 years
D. 2 years

A certain radioactive source emits radiations that were found to be deflected by both magnetic and electric fields. The radiations are

A. beta rays
B. gamma rays
C. x-rays
D. unltr-violet rays

A 2H inductor has negligible resistance and is connected to a 50/π Hz A.C. Supply. The reactance of the inductor is

A. 200 Ω
B. 50 Ω
C. 100/π Ω
D. 25/π Ω

A cell of internal resistance 1Ω supplies current to an external resistor of 3Ω. The efficiency of the cell is

A. 25%
B. 33%
C. 50%
D. 75%

A conductor of length 2m carries a current of 0.8A while kept in a magnetic field of magnetic flux density 0.5T. The maximum force acting on it is

A. 0.2N
B. 0.8N
C. 3.2N
D. 8.0N

Light of energy 5eV falls on a metal of work function 3eV and electrons are liberated. The stopping potential is

A. 1.7V
B. 2.0V
C. 8.0V
D. 15.0V

The height at which the atmosphere ceases to exist is about 80km. If the atmospheric pressure on the ground level is 760mmHg, the pressure at a height of 20km above the ground level is

A. 380mmHg
B. 570mmHg
C. 190mmHg
D. 480mmHg

A stone of mass 1kg is dropped from a height of 10m above the ground and falls freely under gravity. Its kinetic energy 5m above the ground is then equal to

A. its kinetic energy on the ground
B. twice its initial potential energy
C. its initial potential energy
D. half its initial potential energy

If a spherical metal bob of radius 3cm is fully immersed in a cylinder containing water and the water level rises by 1cm, what is the radius of the cylinder?

A. 12cm
B. 1cm
C. 3cm
D. 6cm

The resultant of two forces acting on an object is maximum if the angle between them is

A. 45°
B. 0°
C. 90°
D. 180°

I. The earth is not spherical but elliptical in shape
II. Variation in latitude and longitude
III. Rotation of the earth on its axis
IV. Variation in the density of the earthOn which combination of the above does the weight of an object vary on the earth’s surface?

A. I, II, III and IV
B. II, III and IV only
C. I, II and III only
D. I and II only

The efficiency of a machine is always less than 100% because the

A. work output is always greater than the work input
B. load lifted is always greater than the effort applied
C. effort applied is always greater than the load lifted
D. velocity ratio is always greater than the mechanical advantage

Which of the following consists entirely of vector quantities?

A. Velocity, magnetic fulx and reaction
B. Tension, magnetic flux and mass
C. Displacement, impulse and power
D. Work, pressure and moment

Ice cubes are added to a glass of warm water. The glass and water are cooled by

A. conduction only
B. convection only
C. conduction and convection
D. convection and radiation

A ray of light strikes a plane mirror at an angle of incidence of 35°. If the mirror is rotated through 10°, through what angle is the reflected ray rotated?

A. 70°
B. 45°
C. 25°
D. 20°

The terrestrial telescope has one extra lens more than the astronomical telescope. The extra lens is for

A. improving the sharpness
B. creating an inverted image
C. magnification of the image
D. erection of the image

The driving mirror of a car has a radius of curvature of 1m. A vehicle behind the car is 4m from the mirror. Find the image distance behind the mirror.

A. 8/7
B. 4/9
C. 9/2
D. 4/7

The pressure of a given mass of a gas changes from 300Nm-2 to 120Nm-2 while the temperature drops from 127°C to -73°C. The ratio of the final volume to the initial volume is

A. 2 : 5
B. 5 : 4
C. 5 : 2
D. 4 : 5

The thermometric substance of an absolute thermometer is

A. alcohol
B. mercury
C. helium
D. platinum

A plane sound wave of frequency 85.5Hz and velocity 342ms^-1 is reflected from a vertical wall. At what distance from the wall does the wave have antinode?

A. 2m
B. 4m
C. 1m
D. 3m

A string is fastened tightly between two walls 24cm apart. The wavelength of the second overtone is

A. 24cm
B. 16cm
C. 12cm
D. 8cm

A gas with initial volume of 2 X 10^-6m³ is allowed to expand to six times its initial value at constant pressure of 2 x 10⁵Nm^-2. The work done is

A. 2.0J
B. 4. 0 J
C. 12.0 J
D. 2.4 J

A cell of internal resistance r supplies current to a 6.0Ω resistor and its efficiency is 75%. Find the value of r.

A. 4.5Ω
B. 1.0Ω
C. 8.0Ω
D. 2.0Ω

A resistance R is connected across the terminal of an electric cell of internal resistance 2Ω and the voltage was reduced to 3/5 of its nominal value.
The value of R is

A. 3 Ω
B. 2 Ω
C. 1 Ω
D. 6 Ω

A student is at a height 4m above the ground during a thunderstorm. Give that the potential difference between the thundercloud and the ground is 10⁷v, the electric field created by the storm is

A. 2.0 * 10⁶ NC ^-1
B. 2. 5 * 10⁶ NC ^-1
C. 1.0 * 10⁷ NC ^-1
D. 4.0 * 10⁷ NC ^-1

A working electric motor takes a current of 1.5 A when the p.d across it is 250V. If its efficiency is 80%, the power output is

A. 300.0W
B. 469.0W
C. 133.0W
D. 4.8W

The cost of running five 60 W lamps and four 100 W lamps for 20 hours if electrical energy cost #10.00 per kwh is

A. 280.00
B. 160.00
C. 120.00
D. 140.00

In a Daniel cell, the depolarizer, positive and negative electrodes are respectively

A. copper sulphate, copper and zinc
B. manganese dioxide, carbon and zinc
C. sulphuric acid, lead oxide and lead
D. potassium hydroxide, nickel and iron.

when a piece of rectangular glass block is inserted between two parallel capacitor,at constant plate area and distance of separation, the capacitance of the capacitor will

A. increase
B. decrease
C. decrease then increase
D. remain constant

the ratio of electrostatic force F_E to gravitational force F_G between two protons each of charge e and mass m, at a distance d is

A. e/4πԐoGm
B. e²/Gm²
C. Gm²/4πԐoe²
D. e²/4πԐoeGm²

A cell can supply current of 0.4 A and 0.2 A through a 4.0Ω and 10.0Ω resistors respectively.
This internal resistance of the cell is

A. 2.0Ω
B. 1.0Ω
C. 2.5Ω
D. 1.5Ω

The particles emitted when

_{19}^{39} K {decay to}_{19}^{39} K

A. gamma
B. beta
C. electron
D. alpha

100

I. Low pressure.
II. High pressure.
III. High p.d.
IV. Low p.d.
Which combination of the above is true of the conduction of electricity through gases?