Question

In which of the following cases, the bulb will not glow when the switches are turned ON?

• A.
• B.
• C.
• D.

Answer 1

The correct option is A

Materials that allow electric current to pass through them are called conductors.
Materials that do not allow electric current to pass through them are called insulators.

• Metals like steel, gold, silver, copper, and aluminium, are good conductors of electricity.
• Materials like rubber, diamond, dry wood, glass, and paper are bad conductors of electricity.

Since dry wood is a bad conductor of electricity, it will not allow electric current to flow in the circuit. Thus, the bulb will not glow.