100+ Electricity and Circuits Question Answers Pdf - 1

Question: 1

What is the principle of transformer?

It is based on the principle of mutual induction.

Question: 2

Define watt?

If one joule work done is one second then power consumed is one watt.

Question: 3

What are electrochemical cells?

The cells in which the electrical energy is derived from the chemical action are called electrochemical cells.

Question: 4

State coulomb's law?

The magnitude of the electric force between two charges is directly proportional to the product of charges and inversely proportional to the square of the distance between them.

Question: 5

What is meant by electromagnetic induction?

The e.m.f. is generated in a conductor whenever there is a relative motion between the conductor and a magnetic field.

The e.m.f. produced in this way is called an induced emf and the phenomenon is known as electromagnetic induction.