State whether the following statements are true or false.
(a) An electric motor converts mechanical energy into electrical energy.
Answer
False
Explanation
: An electric motor converts electrical energy into mechanical energy.
(b) An electric generator works on the principle of electromagnetic induction.
Answer
True
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.
True
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.
Answer
False
Explanation - A wire with a green insulation is usually the earth wire of an electric supply
