2014 JAMB Physics Past Questions CBT

A quantity which requires magnitude and direction to be specified is

I. Electrical potential
II. Torque
III. Kinetic Energy
IV. Momentum

Which of the quantities listed are vectors?

Which type of motion do the wheels of a moving car undergo?

From the diagram above, the region of zero acceleration is

A car accelerates uniformly from rest at 3 ms^-2, its velocity after traveling a distance of 24 m is

Calculate the escape velocity of a satellite launched from the earth’s surface if the radius of the earth is 6.4 × 10⁶ m

An object of weight 8 kg on earth is taken to a planet where acceleration due to gravity is one-third of its value on earth. The weight of the object on the planet is

[g = 10 ms^-2]

One of the conditions necessary for an object to be in equilibrium when acted upon by a number of parallel forces is that the vector sum of the forces is

What happens when three coplanar non-parallel forces are in equilibrium?

An object of mass 20 kg is released from a height of 10 m above the ground level. The kinetic energy of the object just before it hits the ground is [g = 10 ms^–²]

The energy in the nucleus of atoms produce heat which can be used to generate

A machine whose efficiency is 75% is used to lift a load of 1000 N. Calculate the effort put in to the machine if it has a Velocity ratio of 4.

A wheel and an axle is used to raise a load whose weight is 800 N when an effort of 250 N is applied. If the radii of the wheel and axle are 800 mm and 200 mm respectively, the efficiency of the machine is

A force of 500 N is applied to a steel wire of cross-sectional area 0.2 m². The tensile stress is

From the diagram above, the point that represents the elastic limit is

A glass bottle of initial volume 2 × 10⁴ cm³ is heated from 20°C to 50°. If the linear expansivity of glass is 9 × 10^-6 K^-1 , the volume of the bottle at 50°C is

The small droplets of water that form on the grass in the early hours of the morning is

What is the equivalent of 20 K in the Celsius scale?

The equation P^aV^bT^c = constant reduces to Charles Law if

The quantity of heat needed to raise the temperature of a body by 1 K is the body’s

The melting point of a substance is equivalent to its

The temperature at which the water vapour present in the air is just sufficient to saturate air is

Heat transfer by convection in a liquid is due to the

The distance between two successive crests of a wave is 15 cm and the velocity 300 ms^-1. Calculate the frequency.

A boy receives the echo of his clap reflected by a nearby hill 0.8 s later. How far is he from the hill?
[speed of sound in air 340 ms^-1]

The diagram above shows a stationary wave of wavelength 40 cm in a closed tube. The length L of the resonating air column is

An object is placed 10 m from a pinhole camera of length 25 cm. Calculate the linear magnification.

The focal length of a concave mirror is 2.0 cm. If an object is placed 8.0 cm from it, the image is at

In a compound microscope, the objective and the eyepiece focal lengths are

When a telescope is in normal use, the final image is at

When a negatively charged rod is brought near the cap of a charged gold leaf electroscope which has positive charges, the leaf

What charge is stored in a 0.1 F capacitor when a 10 V supply is connected across it?

Calculate the effective capacitance of the circuit above

The maximum power transfer occurs in a cell when the external resistance is

If a metal wire 4 m long and cross-sectional area 0.8 mm² has a resistance of 6 Ω, find the resistivity of the wire.

A circuit has a resistance of 200 Ω. The resistance of the circuit can be reduced to 120 Ω when

PHCN measures its electrical energy in

What is the best method of demagnetizing a steel bar magnet?

The magnitude of the angle of dip at the equator is

Use the diagram below to answer the question that follows

The diagram above is that of

Use the diagram below to answer the question that follows

The electromotive force in the secondary winding is

What type of reaction is represented by the equation below?

\(\scriptsize ^{2}_{1}X \: + \: ^{2}_{1}X \: \rightarrow \: ^{3}_{2}Y\: + \: ^{1}_{0}n\: + \: Energy \)

When an atom undergoes a beta decay, the atomic number of the nucleus

Calculate the mass of the copper deposited during electrolysis when a current of 4 A passes through a copper salt for 2 hours.

[Ece of Copper Z = 3.3 × 10^-7 kg C^-1]

Which gas produces a pink coloured light in a discharge tube?

When \(\scriptsize ^{210}_{82}P\: decays\: to \:  ^{206}_{80}Pb \: it \: emits\)

In a common emitter configuration, the output voltage is through the