JAMB Physics 2013 Past Questions

When a brick is taken from the earth's surface to the moon, its mass

The resultant of two forces is 50N. If the forces are perpendicular to each other and one of them makes an angle 0f 30^o with the resultant, find its magnitude.

The pair of physical quantities that are scalar only are ?

A simple pendulum of length 0.4m has a period of 2s. What is the period a similar pendulum of length 0.8m at the same place?

A train with an initial velocity of 20ms^-1 is subjected to a uniform deceleration of 2m^-2. The time required to bring the train to a complete halt is?

Calculate the apparent weight loss of a man weighing 70kg in an elevator moving downwards with an acceleration of 1.5ms^-2.

[g = 10ms^-2]

A piece of cork floats in a liquid. What fraction of its volume will be immersed in the liquid?

[Density of the cork = 0.25 x 10³kgm^-3, Density of the liquid = 1.25 x 10³kgm^-3]

An object is moving with a velocity of 5m^-1. At what height must a similar body be situated to have a potential energy equal in value with kinetic energy of the moving body?

If a pump is capable of lifting 5000kg of water through a vertical height of 60m in 15 min, the power of the pump is

The coefficient of friction between two perfectly smooth surface is

Calculate the work done when a force of 20N stretches a spring by 50mm.

At what depth below the sea-level would one experience a change of pressure equal to one atmosphere? Density of sea water = 1013kg^-3, one atmosphere = 0.01 x 10⁵Nm^-2, g = 10ms^-2

What volume of alcohol will have same mass as 4.2m^-3 of petrol?
Density of alcohol = 8.4 x 10²kgm^-3, density of petrol =7.2x10³kgm^-3

Calculate the length which corresponds to a temperature of 20^oC if the ice and steam points of an unguarded thermometer are 400 mm apart

A wire of length 100.0m at 30^o has linear expansive of 2x10^-5K^-1 Calculate the length of the wire at a temperature of - 10^oC

A gas at a pressure of 10⁵Nm^-2expands from 0.6m^-3 to 1.2m³ at constant temperature, the work done is

Two liquids X and Y having the same mass are supplied with the same quantity of heat. If the temperature rise in X is twice that of Y, the ratio of specific heat capacity of X to that of Y is

Food cook quicker in salt water than in pure water because of the effect of

Steam from boiling water causes more damage on the skin than does boiling water because

What will happen to the boiling point of pure water when it is heated in a place 30m below sea level?

The rise or fall of a liquid in a narrow tube is because of the

The mechanism of heat transfer from one point to another through the vibration of the molecules of the medium is

A wave that travels through stretched strings is known as

A transverse wave and a longitudinal wave travelling in the same direction in a medium differ essentially in their

What is the velocity of sound at 100 ^oC if the velocity of sound at 0 ^oC is 340ms ^-1?

If a sonometer has a fundamental frequency of 450HZ, what is the frequency of the fifth overtone?

A man 1.5m tall is standing 3m in front of a pinhole camera whose distance between the hole and the screen is 0.1m. What is the height of the image of the man on the screen?

A ray of light passing through the centre of curvature of a concave mirror is reflected by the mirror at

Total internal reflection will not occur when light travels from

If the linear magnification of the objective and eyepiece convex lenses of a compound microscope are 4 and 7 respectively. Calculate the angular magnification of the microscope

The angle of deviation of light of various colours passing through a triangular prism increases in the order

Calculate the force acting on an electron of charge 1.5 x 10^-19C placed in an electric field of intensity 10⁵Vm^-1

Capacitors are used in the induction coil to

A cell of emf 1.5V is connected in series with a 1Ω resistor and a current of 0.3A flows through the resistor. Find the internal resistance of the cell

Which of the following obeys ohms laws?

A house has ten 40W and five 100W bulbs. How much will it cost the owner of the house to keep them lit for 10 hours if the cost of a unit is 5N?

An electric device is rated 2000W, 250V. Calculate the maximum current it can take

When a charge moves through an electric circuit in the direction of an electric force, it

To convert a galvanometer to a voltmeter, a

Induced emfs are best explained using

If a current of 2.5A flows through an electrolyte for 3 hours and 1.8g of a substance is deposited, what is the mass of the substance that will be deposited if a current of 4A flows through it for 4.8 hours?

Calculate the energy of the third level of an atom if the ground state energy is - 24.8eV

In photo-emission, the number of photo-electrons ejected per second depends on the

The particle nature of light is demonstrated by the

The energy of a photo having a wavelength of 10^-10m is
(h= 6.63 x 10 ^-34Js, c =3.0 x 10 ⁸ms^-1)

The bond between silicon and germanium is