Question Bank

A device that converts chemical energy into electrical energy is a:

In an electric circuit, the flow of electrons is from:

What is the unit of electric power?

The resistance of a conductor is inversely proportional to its:

Which component is used to 'open' or 'close' an electric circuit?

What does a galvanometer detect?

In a domestic circuit, the fuse is always connected to the:

What is the color of the insulation on the earth wire in the modern international color code?

The heating element of an electric iron is made of:

The commercial unit of electrical energy is:

A step-up transformer increases the:

The magnetic effect of electric current was first discovered by:

An electric generator works on the principle of:

One kilowatt-hour (1 kWh) is equal to how many Joules?

If two 10 Ohm resistors are connected in series, the total resistance is:

A volt-meter is always connected in ________ with the component to measure potential difference.

The core of an electromagnet is typically made of:

What happens to the resistance of a wire if its length is doubled?

The primary purpose of earthing an electrical appliance is to:

What type of current is obtained from a dry cell battery?