Question

Which of the following factors could you change in a system and not change its induced EMF?

A.
magnetic field
B.
type of wire
C.
velocity of the wire
D.
length of the wire in the field

Answer 1

The type of wire

Step-by-step explanation:

E=Blv

Answer 2

The type of wire

Step-by-step explanation:

The EMF is induced in the closed conducting loop whenever there is a change in the magnetic flux linked with it. Mathematically, it is given by :

`\epsilon=(-d\phi)/(dt)`

Where

`\phi` is the magnetic flux

`\phi=B.A`

`\epsilon=(-d(BA))/(dt)`

For n number of coils,

`\epsilon=(-d(NBA))/(dt)`

Where

B is the magnetic field

A is the area of the coil

If the coil is moved with the speed of v in the magnetic field, then induced EMF is given by :

`\epsilon=Blv`

l is the length of the coil

So, the induced EMF depends on the following factors:

1. magnetic field
2. velocity of the wire
3. length of the wire in the field

So, the type of wire do not change the induced emf of the coil. Hence, the correct option is (b).