BUK Physics 2011/2012 Past Questions

A bead travelling on a straight wire is brought to rest at 0.2m by friction. If the mass of the bead is 0.01kg and the coefficient of friction between the bead and the wire is 0.1, determine the work done by the friction

On top of a spiral spring of force constant 500Nm^-1 is placed a mass of 5 × 10^-3kg. If the spring is compressed downwards by a length of 0.02m and then released, calculate the height to which the spring is projected

A test tube of radius 1.0cm is loaded to 8.8g. If it is placed upright in water, find the depth to which it will sink

A hose of cross sectional area 0.5² is used to discharge water from a water tanker at a velocity of 60ms^-1 in 20s into a container. If the container is filled completely, the volume of the container is

A force of 100N is used to kick a football of mass 0.8kg. Find the velocity with which the ball moves if it takes 0.8s to be kicked

A satellite is in parking orbit if its period is

A tuning fork of frequency 340Hz is vibrated just above a cylindrical tube of height 1.2m. If water is slowly poured into the tube, at what maximum height will resonance occur?

By what factor will the size of an object placed 10cm from a convex lens be increased if the image is seen in a screen placed 25cm from the lens?

Thermal equilibrium between two objects exist when

Given that young's modulus for aluminium is 7.0 × 10¹⁰ Nm^-2 and density is 2.7 × 10³ Kgm^-3 find the speed of the sound produced if a bar is struck at one end of the hammer.

At what position will an object be placed in front of a concave mirror in order to obtain an image at infinity

A positively charged rod X is brought near an uncharged metal sphere Y and is then touched by a finger with X still in place. When the finger is removed, the result is that Y has

The operation of an optical fibre is based on the principle of

A ray of light is incident on an equilateral triangular glass prism of refractive index 1.5 Calculate the angle through which the ray is minimally deviated in the prism

A wire of 2Ω resistance is drawn out so that its new length is two times the original length. If the resistivity remains the same and the cross sectional area is halved, the new resistance is

An electron of charge 1.6 × 10^-19 is accelerated between two metal plates. If the kinetic energy of the electron is 4.8 × 10^-17, the potential difference between the plates is

In the calibration of an ammeter using faraday's laws of electrolysis, the ammeter reading is kept constant at 1.2A. If 0.990g of copper is deposited in 40 minutes , the correction to be applied to the ammeter is

Marching soldiers crossing a suspension bridge are usually advised to break their steps to avoid damaging the bridge owing to

A force of 200N acts between two objects at a certain distance apart. The value of the force when the distance is halved is

The battery connection that permits current to flow across a p-n junction is called