Explain what is short circuiting of an electric supply.

(i) What is the function of earth wire in electrical instruments? (ii) Explain what is short circuiting an electric supply. (iii) What is the usual current rating of the fuse wire in the line to feed: (a) Lights and fans? (b) Appliances of 2kW or more power?

Explain the term short circuiting. What does a short circuit lead to?

What the two main precautions to be taken while using an electric supply?

What is an electric circuit ?

What is the name of a safety device which cuts off the electricity supply during a short circuit by turning off a switch ?

What is the name of a safety device which cuts off the electricity supply during a short circuit by breaking a thin wire ?

Explain electric circuit and draw a simple electric circuit.