UNN Physics 2007/2008 Past Questions

The extension of a spring when 5g weight was hung from it was 0.56cm. If Hooke's law is obeyed, what is the extension caused by a load of 20g weight?

The distance traveled by a particle starting from rest is plotted against the square of the time elapsed from the commencement of motion. The resulting graph is a measure of

A 90cm uniform lever has a load of 30N suspended at 15cm from one of its ends. If the fulcrum is at the centre of gravity, the force that must be applied at its other end to keep it in horizontal equilibrium is

Two points on a velocity-time graph have coordinates (5s, 10m/s) and (20s, 20m/s). Calculate the mean acceleration between the two points

Which of the following statements are correct?
I. Land and sea breezes are natural convection
II. The vacuum in a thermos flask prevents heat loss due to convection only
III. Convection may occur in liquids or gases but not in solids

The property of the eye known as its power of accommodation is controlled by the

Under constant tension and constant mass per unit length, the note produced by a plucked string is 500Hz when the length of the wire is 0.9m. At what length is the frequency 150Hz?

An object is placed in front of two plain mirrors inclined at an angle of θ°

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

If the distance between two points charges is increased by a factor of four, the magnitude of electrostatic force between them will be

The terminal voltage of a battery is 4.0V when supplying a current of 2.0A; and 2.0V when supplying a current of 3.0A. The internal resistance of the battery is

The primary aim in high tension transmission is to

Which of the following is required to convert a milliammeter to ammeter?

A light of energy 5eV falls on a metal and electrons with a maximum kinetic energy of 2eV are ejected. The work function of the metal is

One of the features of fission process is that