ELECTRICITY & CIRCUITS

Why is it unsafe to switch on a bulb with wet hands?

• The switch blows off.

• It can give a shock.

• The bulb gets fused.

• The wires are disconnected.

Why do electricians wear gloves made of rubber?

• It is soft.

• It is waterproof.

• It is an insulator.

• It is inexpensive.

If we touch a a live wire carrying current, we get a shock. This is because our body is a/an

• conductor of electricity

• insulator of electricity

• source of electricity

• None of these

Which among the following metal is used for making electric wires?

• Graphite

• Iron

• Copper

• Zinc

Which of the following does NOT conduct electricity?

• Aluminium

• Salt solution

• Silver

• Ceramic articles

Why is a switch used in a circuit?

• To complete or break a circuit

• To save energy

• To prevent electric shocks

• To make the bulb glow easily

The bulb in a circuit glows when electric current

• flows through the glass covering

• flows through its filament

• stops flowing to the bulb

• flows into the air through the bulb

What are the two places on the battery to which the wires can be attached called?

• Switches

• Filaments

• Insulators

• Terminals

A cell, a conducting wire and a bulb are used for constructing a simple electric circuit. What are they called?

• Consumers

• Connectors

• Components

• Sources

For electrical energy to flow, there must be a(n) ______.

• good battery
• copper wire
• on/off switch
• closed circuit