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State whether the following statements are true or false.
(a) An electric motor converts mechanical energy into electrical energy.
: An electric motor converts electrical energy into mechanical energy.
(b) An electric generator works on the principle of electromagnetic induction.
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.
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