The SI units of current, resistance & power are respectively

If the total magnetic flux in a coil is divided by the cross sectional area of the coil, the unit produced will be measured in

A conductor 100m long has across sectional area of 1mm² and a resistance of 2Ω. If the conductor is cut into two 50m lengths and joined in parallel, the resistance of the combined conductor will be

A simple machine consists of a coil of wire being rotated within a magnetic field by an exterior force. This will demonstrate the principle of a

The sinusoidal waveform (sine wave) shown in figure 1 below will be produced by a

A machine has an input of 10kW and an output of 7.5kW. The efficiency of the machine will be

Which one of the following conductive materials would not be used in a flexible cable

Which one of the following materials is not an insulator

An emf may be produced in three ways. These are

a.c. is used for long distance transmission instead of direct current because

When describing current flow in a d.c parallel circuit (see above) which of the following statements is true

In Fig 3 the arrow indicates the direction of current flow in a coil. The north pole will be at position

Ammeters and voltmeters must be connected as follows

In a double wound transformer the secondary winding is always connected to the

A value of 300mA expressed in Ampere would be

A 3000w load connected to a 240v supply will take a current of

In fig 4, the component parts of a circuit are shown.

The devices providing circuit protection and control are

Calculate the resistance of a single core copper cable 200m long and 25mm² CSA. Take the resistivity of copper to be 1.72 x 10^-8 ohm/metre³

33kV is used for what?