BUK Physics 2012/2013 Past Questions

A transformer is rated 240V. If the primary coil is 4000 turns and the secondary voltage is 12V, determine the number of turns in the secondary coil

The time it will rake a certain radioactive material with half-life of 50 days to reduce to 1/32 of its original number is

If two inductors of inductance 3H and 5H are arranged in series, the total inductance is

Satellite communication network makes use of

The resistance of a piece of wire of length 20m and cross sectional area 8 × 10^-6m² is

The north pole of a magnet can never be separated from the south pole because of a property known as

An electric device is rated 2000W, 250V. The correct fuse rating of the device is

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

The process through which electrons leave the surface of hot metals is known as

An engine of a car of power 80kW moves a rough road with a velocity of 32ms^-1. The force required to bring it to rest is

The correct unit of energy density is

The main purpose of a transformer in an a.c radio set is to

An object placed 10cm from a concave mirror of focal length 5cm would have its image

Non-luminous objects can be seen because they

The thermos-flask is designed to

Which of the following processes cannot be explained by the molecular theory of matter

Which of the following equations represents the distance, X, travelled by a body moving on a straight road with a constant speed [Her symbols have their usual meanings]

Electrical resistance is a property of an electrical conductor that causes electrical energy to be converted into

The volume of an ideal gas at pressure of 77cm Hg and temperature 60°c is 240cm³. If the temperature and pressure are increased to 98°c and 81cm Hg respectively, calculate the new volume of the gas.

Humidity is used to describe the amount of

Dispersion of white light by a glass prism occurs because

Three identical lamps each of power 100W are connected in parallel across potential difference of 250V. Calculate the current in the circuit