Question

When a bar magnet is thrust at the same speed into a coil having twice the number of loops, the induced voltage is the same, no different. half. twice as much. four times as much. none of the above

Answer 1

Twice as much

Step-by-step explanation:

Changing magnetic flux through a coil produce emf in the coil.

According to Faraday's law induced voltage is given by

∈= - N *dФ \ dt -----------( 1 )

N is number of turns of coil

Ф is flux linkage

dФ/dt is rate of change of flux

From equation (1) it is clear if rate of change of flux is the same but we doubled the number of loops (i.e N₂= 2N₁) the voltage induced will be double.