Ether produces a cooling effect when it is poured on the hand because it has

• A. low conductivity
• B. high conductivity
• C. high latent heat of vaporization
• D. low latent heat of vaporization

Which of the following is NOT a Fundamental S.I unit?

• A. Metre
• B. Ampere
• C. Newton
• D. Second

(a) Explain the term electrolyte and give two examples.

(b) State the relationship between the mass of a substance liberated during electrolysis and the charge passed.

Which of the following properties of a long steel bar would alter if the bar were melted, recast into a cube and allowed to cool to its original temperature?

• A. sensity
• B. volume
• C. specific heat capacity
• D. electrical resistance

The speed of sound in air is 330ms^-1. How far from the centre of a storm is an observer who hears a thunder clap 2s after the lightning flash? (Neglect the time taken by light to travel to the observer)

• A. 1320m
• B. 660m
• C. 600m
• D. 330m

The production of pure spectrum could easily be achieved using a?

• A) glass prism with a pin
• B) triangular prism with two convex lens
• C) traingular prism only
• D) triangular prism with two concave lenses

A ball is moving at 18ms^-1 in a direction inclined at 60^o to the horizontal. The horizontal component to its velocity is

• A.9√3ms^-1
• B.6√3ms^-1
• C.8√3ms^-1
• D.9ms^-1

Four cells each of e.m.f 1.5V and internal resistance of 4Ω are connected in parallel. What is the effective e.m.f. and internal resistance of the combination?

• A. 6.0V, 16Ω
• B. 6.0V, 1Ω
• C. 1.5V, 4Ω
• D. 1.5V, 1Ω

What is the potential difference between X and Y in the diagram below if the battery is of negligible internal resistance

• A. 12.5V
• B. 5.8V
• C. 5.0V
• D. 3.0V

(a) Explain the term net force.

(b) Define the principle of conservation of linear momentum and state one example of it.

(c) A ball of mass 200 g released from a height of 2.0 m hits a horizontal floor and rebounds to a height of 1.8 in. Calculate the impulse received by the floor. (g = 10 ms\(^{-2}\)).

(d) A body of mass 20 g performs a simple harmonic motion at a frequency of 5 Hz. At a distance of 10 cm from the mean position, its velocity is 200 cms\(^{-1}\). Calculate its:

(i) maximum displacement from the mean position;

(ii) maximum velocity;

(iii) maximum potential energy. (g = 10 ms\(^{-2}\) \(\pi\) = 3.14)