Which of the following is a secondary colour

• A) blue
• B) orange
• C) red
• D) green

In the diagram below, the pressure of the gas is

• A) 86 cm of mercury
• B) 66 cm of mercury
• C) 96 cm of mercury
• D) 76 cm mercury

An object is moving with a velocity of 5m^-1. At what height must a similar body be situated to have a potential energy equal in value with kinetic energy of the moving body?

• A. 25.0m
• B. 20.0m
• C. 1.3m
• D. 1.0m

an electric cell with nominal voltage E has a resistance of 3Ω connected across it. If the voltage falls to 0.6E, the internal resistance of the cell is

• A. 1Ω
• B. 2Ω
• C. 3Ω
• D. 4Ω

Explain each of the following terms as used in Electronics.

(a) free electrons;

(b) holes.

A machine is used to lift a load of 20 N through a height of 10 m. if the efficiency of the machine is 40%, how much work is done?

• A) 80 J
• B) 500 J
• C) 300 J
• D) 120 J

Two forces 6N and 8N, act eastwards and northwards respectively on a body. Calculate the magnitude of their equilibrant

• A. 2N
• B. 7N
• C. 10N
• D. 14N

The amount of heat needed to raise the temperature of 10kg of Copper by 1K is its

• A. specific heat capacity
• B. latent heat
• C. heat capacity
• D. internal energy

PHCN measures its electrical energy in

• A. W
• B. KWh
• C. Wh
• D. J

Determine the inductive reactance when a 30.0mH inductor with a negligible resistance is connected to a 1.3 x 103Hz oscillator.

• A. 39.0Ω
• B. 122.5Ω
• C. 245.0Ω
• D. 39000.0Ω