JAMB Physics 2014 Past Questions

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

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?

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

Calculate the escape velocity of a satellite launched from the earth's surface if the radius of the earth is 6.4x10⁶m

An object of weight 80kg 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

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 20kg is released from a height of 10m above the ground level. The kinetic energy of the object just before it hits the ground is

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 1000N. 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 800N when an effort of 250N is applied. If the radii of the wheel and axle are 800mm and 200mm respectively, the efficiency of the machine is

A force of 500N¹ is applied to a steel wire of cross-sectional area 0.2m², The tensile stress is

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

What is the equivalent of 20K in 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 1K 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 15cm and the velocity 300ms^-1. Calculate the frequency.

A boy receives the echo of his clap reflected by a nearby hill 0.8s later. How far is he from the hill?

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

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

In a compound microscope, the objective and the eye piece 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 0.1F capacitor when a 10V supply is connected across it?

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

If a metal wire 4m long and cross-sectional area 0.8 mm² has a resistance of 60, find the resistivity of the wire

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

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 4A passes through a copper salt for 2 hours. [Ece of Copper z=3.3x10^-7kgC^-1]

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

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

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

What type of reaction is represented by the equation \(^{2}_{1}X+^{2}_{1}X\rightarrow^{3}_{2}Y+^{1}_{0}n+Energy\)

A glass bottle of initial volume 2 x 10⁴ cm³ is heated from 20^oC to 50^oC. If the linear expansivity of glass is 9 x 10⁶K^-1, the volume of the bottle at 50^oC is