State whether the following statements are true or false.



(a) An electric motor converts mechanical energy into electrical energy.



Explanation : An electric motor converts electrical energy into mechanical energy.

(b) An electric generator works on the principle of electromagnetic induction.



Explanation :

Electromagnetic induction is the process of production of electricity (electric current) when magnetic field changes

The electrical generator works on the principle that when a straight conductor is moved in a magnetic field, then current is induced in the conductor. 

(c) The field at the centre of a long circular coil carrying current will be parallel straight lines.


Explanation -

A long circular coil is a solenoid.

The field lines inside a solenoid are parallel.

(d) A wire with a green insulation is usually the live wire of an electric supply.



Explanation - A wire with a green insulation is usually the earth wire of an electric supply



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CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo