1. The most important safety method used for protecting home appliances from short circuiting or overloading is ?

Use of fuse

Use of electric meter

Earthing

Use of stabilizers

Answer: Use of fuse

Explanation:

The most important safety method used for protecting home appliances for short circuiting or over loading is the electric fuse. This is a safety device having thin wire of short length made of tin (25%) and the lead (75%) alloy having low melting point around 200 degree Celsius. The fuse wire is of chosen, thickness, so as to fix its resistance and hence amount of hitting on passage of a particular amount of current. Whenever current through the fuse exceeds the set limit, the fuse wire melts and breaks the circuit. This saves the main circuit components from damage.


2. A magnetic field line is used to find the direction of ?

A bar magnet

Magnetic field

A compass needle

South-north

Answer: Magnetic field

Explanation: