Physics 2025 JAMB Past Questions Secure Now

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Under which conditions is work done

A. A man supports a heavy load on his head with hands.
B. A woman holds a pot of water
C. A boy climbs onto a table
D. A man pushes against a stationary petrol tanker

The mechanical advantage of the machine shown above

A. 7.5
B. 15.5
C. 30.0
D. 60.0

Rainbow is formed when sunlight undergoes

A. reflection
B. refraction
C. dispersion
D. diffraction

Find the value of a capacitor with voltage 5V and 30C.

A. 7f
B. 6f
C. 15f
D. 0.17f

The friction due to air mass can be reduced by

A. streaming
B. lubricating
C. propeller
D. polishing

Which of the following operates based on magnetic effect of electric current?

A. electric heater
B. photocell
C. Dynamo
D. Cold cathode

When a charged ebonite rod is brought near a charged glass rod, there will be

A. attraction
B. repulsion
C. spark
D. no force experienced

Pilots uses aneroid barometer to know the height above sea level because

A. Very accurate
B. Small and convenient
C. Heavy and huge
D. Costly

A light ray passing from air into water at an angle of 30º from the normal in air would

A. make an angle greater than 30

in water surface
B. be completely absorbed by the water surface
C. be completely reflected by the water surface
D. make an angle less than 30

from the normal in water

A solid cube of aluminum is 1.5cm on each edge. The density of aluminum is 2700kgm

. Find the mass of the cube.

A. 7.5g
B. 9.1g
C. 12.0g
D. 15.0g

The value of R required to make the galvanometer measure voltage up to 40V in the diagram above

A. 1885 Ω
B. 1990Ω $Ω$

C. 1995Ω $Ω$
D. 1100Ω $Ω$

If the S.V.P of water vapour was 13.5mmHg at 33ºC and 7.3mmHg at 7ºC. Find the percentage relative of the air on a day when average air temperature was 33ºC and dew point was 7ºC.

A. 55%
B. 60%
C. 54%
D. 51%

Electrolysis can be investigated using

A. Voltmeter
B. Ammeter
C. Galvanometer
D. Voltameter

A wheelbarrow inclined at 60º to the horizontal is pushed with a force of 150N. What is the horizontal component of the applied force

A. 130N
B. 75N
C. 60N
D. 50N

In a solar panel, solar beam is concentrated by using

A. Concave mirror
B. Convex mirror
C. Plane mirror
D. Triangular mirror

A rectifier is a device that changes

A. D.C to D.C
B. D.C to A.C
C. A.C to A.C
D. A.C to D.C

The moon’s acceleration due to gravity is 1/6 of the earth’s value. The weight of a bowling ball on the moon would be

A. 6 times its weight on the earth
B. of its weight on the earth

C. 36 times its weight on the earth
D. equal to its weight on the earth

If a sheet of an insulating material is inserted between the plates of an air capacitor, the capacitance will

A. become zero
B. decrease
C. increase
D. remain unchanged

A sonometer’s fundamental note is 50Hz, what is the new frequency when the tension is four times the original?

A. 25Hz
B. 100Hz
C. 200Hz
D. 250Hz

Which of the following is not a part of model rocket?

A. The body tube
B. The nose cones
C. The fin
D. Not recovery devices

A mass of gas at 40mmHg is heated from 298k to 348k at constant volume. Cal the pressure exerted by the gas.

A. 50.21mmHg
B. 46.71mmHg
C. 42.35mmHg
D. 35.12mmHg

The thermometer whose thermometric property is change in volume with temperature is

A. Resistance thermometer
B. Thermocouple
C. Bimetallic thermometer
D. Liquid-in-glass thethermometer

In a series resonant circuit, the current flowing in the circuit is

A. maximum
B. minimum
C. zero
D. unaffected

If a body in linear motion changes from point P to Q, the motion is

A. Translational
B. Rotational
C. Simple harmonic
D. Circular

Which of these gas laws is equivalent to workdone

A. Charle’s law
B. Pressure law
C. Boyle’s law
D. Gay Lussac’s law

The process of adding impurities to a semiconductor material to increase its conductivity is

A. Rectification
B. Emission
C. Doping
D. Stabilization

Which of the following is the best as shaving mirror?

A. Concave mirror
B. Convex mirror
C. plane mirror
D. parabolic mirror

A refrigerator uses 150W. If it is kept on for 336 hours non-stop, what is the energy consumed in KWh?

A. 60.20KWh
B. 50.40KWh
C. 25.01KWh
D. 30.20KWh

What is the inductance reactance of a coil of 7H when connected to a 50Hz a.c circuit?

A. 2200 Ω

B. 2000 Ω
C. 1200 Ω
D. 1100 Ω

In electrolysis, when same quantity of electricity is passed through different electrolytes, mass of substances deposited is proportional to

A. Molecular weight
B. Chemical equivalent
C. Atomic number
D. Chemical equivalent per valency

The degree of precision of a vernier caliper is

A. 0.005cm
B. 0.01cm
C. 0.1cm
D. 1.0cm

According to kinetic theory of gases, the pressure exerted by the gas on the wall is equal

A. change in momentum per unit volume
B. rate of change of momentum imparted by the walls per second per unit area
C. momentum imparted to the walls per unit area
D. change in momentum imparted to the walls per unit area

The property by which a material returns to its original shape after the removal of force is called

A. Elasticity
B. Ductility
C. Malleability
D. Plasticity

The energy in a moving car is an example of

A. Mechanical energy
B. Electrical energy
C. Potential energy
D. Kinetic energy

What is the least possible error encountered when taking measurement with a metre rule?

A. 1.1mm
B. 0.5mm
C. 0.2mm
D. 0.1mm

At absolute zero temperature, the average velocity of the molecules

A. Decreases
B. Increases
C. Is zero
D. Is uncertain

Calculate the quantity of heat for copper rod whose thermal capacity is 400Jk for a temperature change of 60ºC to 80ºC

A. 2KJ
B. 4KJ
C. 6KJ
D. 8KJ

Using the diagram above, the effective force pushing it forward at an angle 60º is

A. 25.00N
B. 28.87N
C. 38.50N
D. 443.30N

The gravitational force between two objects is 10N, what is the new value of the force if the distance between them is halved?

A. 10N
B. 20N
C. 40N
D. 80N

An ideal transformer has

A. Maximum primary resistance
B. No flux leakage
C. Hysteresis
D. Eddy current

Calculate the depth of a swimming pool if the apparent depth is 10cm. ( Refractive index of water = 1.33 )

A. 7.5cm
B. 10.0cm
C. 13.3cm
D. 6.87cm

The tangential force acting on an object that opposes it from sliding freely on the adjacent surface is called

A. Normal force
B. Friction force
C. Weight
D. Upthrust

Two tuning forks of frequencies 6Hz and 4Hz respectively are sounded together. The beat frequency is

A. 2Hz
B. 5Hz
C. 8Hz
D. 10Hz

The capacitance of a capacitor, C, is inversely proportional to

A. area of the plate
B. dielectric substance
C. distance between plate
D. direction of the plate

An object is placed 25cm in front of a convex mirror has its image formed 5cm behind the mirror. what is the focal length of the convex mirror

A. 8.20cm
B. 6.25cm
C. 5.60cm
D. 4.50cm

In a Hare’s apparatus, the height of water and a liquid X are 0.3m and 0.5m respectively. The relative density of x is?

A. 0.4
B. 0.6
C. 1.7
D. 2.0

The land and sea breeze is attributed to

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

A practical application of total internal reflection is found in

A. rainbow
B. diverging lens
C. converging lens
D. fiber optics

A body is pulled on a horizontal surface with a rope inclined at 30º to the vertical. If the effective force pulling the body along the horizontal surface is 15N, calculate the tension on the rope.

A. 30N
B. 60N
C. 22.5N
D. 75N

Using the diagram above, calculate the relative density of x, if the density of methanol is 800kgm -3

A. 0.8
B. 0.5
C. 1.5
D. 2.5

Physics 2025 JAMB Past Questions Secure Now