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.
Magnetic Field in a Solenoid.jpg



(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

Different types of Wire in Domestic Electric Circuit - Teachoo.png

 

  1. Class 10
  2. Chapter 13 Class 10 - Magnetic Effects of Electric Current

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.