Question

Give reasons for the follow statements. 1) If a bulb is fused, it does not glow. 2) Rubber plastics and gramics can protect us from the dangers of electricity. 3) A person can get a fatal electric shock on touching an uncouered electric wire.

Answer 1

Question= If a bulb is fused, it does not glow.

Answer:

If a bulb does not glow even when a cell is connected and the circuit is complete, then it means the filament is broken and the bulb is fused.

Question: Rubber plastics and gramics can protect us from the dangers of electricity.

Answer:

Rubber, Plastics and gramics can protect us from the dangers of electricity as they are insulator.

Question: A person can get a fatal electric shock on touching an uncouered electric wire.

Answer:

A person can get fatal electric shock on touching an unconvered electric wireas wire is good conducter of electricity.

Answer 2

• A break in the filament of an electric bulb means a break in the path of the current between the terminals of the electric cell. Therefore, a fused bulb does not light up as no current passes through its filament. ... This makes the bulb glow.

• Rubber, Plastics and gramics can protect us from the dangers of electricity as they are insulator.

• The human body is a good conductor of electricity. If you touch an uncovered electric wire, the electricity will flow through your body causing electrical shock.