Priyanka B Solutions for Chapter: Magnetic Effects of Electric Current, Exercise 4: Assignment-4

Out of the three wires live, neutral and earth, switch is connected in which wire.

Mention the colour convention of live, neutral and earth wire.

Name the condition in which live wire comes in direct contact with neutral wire? What happens in this condition ?

State the function of a fuse in a circuit. How is it connected in the domestic circuit?

What are the causes of short circuiting?

When is an electric circuit said to be overloaded? State two measures to avoid it. What name is given to a situation in which the live and the neutral wires accidently come in contact? State the role of a safety device in this situation.

(a) Draw a schematic diagram of common domestic circuit.

(b) State the function of fuse and earth wire.

(a) State the rule to determine the direction of

     (i) magnetic field produced around a straight conductor carrying current.

    (ii) force experienced by current-carrying straight conductor placed in a magnetic field which is perpendicular to it.

   (iii) current induced in a coil due to its rotation in a magnetic field.

(b) What is the function of an earth wire? Why is it necessary to earth metallic appliances?