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

• A. 15N
• B. 20N
• C. 30N
• D. 60N

A stone of mass 1kg is dropped from a height of 10m above the ground and falls freely under gravity. Its kinetic energy 5m above the ground is then equal to

• A. its kinetic energy on the ground
• B. twice its initial potential energy
• C. its initial potential energy
• D. half its initial potential energy

(a) Explain diffusion

(b) State one factor that can affect the rate of diffusion.

An ammeter connected to an a.c circuit records 5.5. The peak current in the circuit is

• A. 7.8A
• B. 7.1A
• C. 3.8A
• D. 3.5A

Which of the following sets of coloured light is/are secondary colours i. Red, Blue and green ii. Blue, cyan and magneta iii. Green, Magenta and yellow, IV Yellow, Cyan and Magenta

• A. i and ii only
• B. ii and iii only
• C. iv only
• D. i, ii and iv only

The diagram below illustrates the wire connections to a three-pin plug. The wires P, Q and R respectively are:

• A. live, neutral and earth
• B. neutral, earth and live
• C. earth, live and neutral
• D. earth, neutral and live

The pressure of a given mass of a gas changes from 300Nm-2 to 120Nm-2 while the temperature drops from 127°C to -73°C. The ratio of the final volume to the initial volume is

• A. 2 : 5
• B. 5 : 4
• C. 5 : 2
• D. 4 : 5

The resultant of two forces acting on an object is maximum when the angle between them is?

• A. 180°
• B. 90°
• C. 45°
• D. 0°

A 15kg mass, suspended from a ceiling, is pulled aside with a horizontal force, F, as shown in the diagram below. Calculate the value of the tension, T. (g = 10ms^-2)

• A. 300.0N
• B. 173.2N
• C. 30.0N
• D. 17.3N

What is the angular magnification of a telescope having objective and eyepiece lenses of a focal lengths 30cm and 3cm respectively?

• A. 60
• B. 10
• C. 30
• D. 90