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.
(a) Both A and B are true.
(b) A is true but B is false.
(c) B is true but A is false.
(d) Both A and B are false.

Answer 1

Flux is Induced Because of Magnetic Field

Explanation:

Since, We know that Electromagnetic Force, $e = -\frac {d\phi}{dt}$

When any conductor is kept in magnetic field, then it produces Magnetic Flux, as to which option (a) is True

Since, $e = -\frac {d\phi}{dt}$ ia a necessary condition

Also, $\phi = B \times A$ which says if Area (A) is constant then Magnetic Field (B) should not change and if Magnetic Field is constant then Area is Variable.

So, Flux changes because of Magnetic Field, which satisfy Option B

Hence, Both A and B are True.

Answer 2

Answer:

Flux is Induced Because of Magnetic Field

Explanation:

Since, We know that Electromagnetic Force, e = -\frac {d\phi}{dt}e=−

dt

dϕ

When any conductor is kept in magnetic field, then it produces Magnetic Flux, as to which option (a) is True

Since, e = -\frac {d\phi}{dt}e=−

dt

dϕ

ia a necessary condition

Also, \phi = B \times Aϕ=B×A which says if Area (A) is constant then Magnetic Field (B) should not change and if Magnetic Field is constant then Area is Variable.

So, Flux changes because of Magnetic Field, which satisfy Option B

Hence, Both A and B are True.