Electrical Safety

IMPORTANT

Electrical Safety: Overview

This topic covers concepts, such as, Fuse, Electric Fuses, Role of Fuses, Miniature Circuit Breaker, Earthing, Electrical Cables, Trip Switch & Residual Current Device etc.

Important Questions on Electrical Safety

EASY
IMPORTANT
Physics>Electric Circuits>Electrical Safety> Q 1

Functioning of RCD and Fuse are same. 

EASY
IMPORTANT
Physics>Electric Circuits>Electrical Safety> Q 2

What is residual-current device (RCD) ?

EASY
IMPORTANT
Physics>Electric Circuits>Electrical Safety> Q 3

A trip switch replaces the fuse.

EASY
IMPORTANT
Physics>Electric Circuits>Electrical Safety> Q 4

What is a trip switch ?

EASY
IMPORTANT
Physics>Electric Circuits>Electrical Safety> Q 5

For which of these wire of an electrical cable is connected to metal surface of an electric appliance for earthing.

MEDIUM
IMPORTANT
Physics>Electric Circuits>Electrical Safety> Q 6

You hold each of the appliances shown below in your hand to use them. What material is used for the part of the appliance you hold? Is the material an electrical conductor or an electrical insulator? Why does this make the appliance safe to use?

A B C
Question Image Question Image Question Image

MEDIUM
IMPORTANT
Physics>Electric Circuits>Electrical Safety> Q 7

Why do fuse wire have low melting point? Give reasons for melting of fuse wires.