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

The type of wire

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 :

Where

is the magnetic flux

For n number of coils,

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 :

l is the length of the coil

So, the induced EMF depends on the following factors:

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

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the second one and the forth one are in the purple because they are opinions and the rest are in the yellow

explanation: