Question

Consider the following statements:-

(A) An emf can be induced by moving a conductor in a magnetic field.
(B) An emf can be induced by changing the magnetic field.

Options

• Both A and B are true

• A is true but B is false

• B is true but A is false

• Both A and B are false

Answer 1

Both A and B are true

 

Statement A is true, as an emf can be induced by moving a conductor with some velocity v in a magnetic field B. It is given by

`e=Bvl`

Statement B is true, as an emf can be induced by changing the magnetic field that causes the change in flux ϕ through a conductor or a loop. It is given by

`e=-(dphi)/(dt)`