Question

The number of turns in a solenoid is doubled, and at the same time its length is doubled.

Part A:Does the magnetic field within the solenoid increase, decrease, or stay the same?
Part B:Choose the best explanation from among the following:
A:Making a solenoid longer decreases its magnetic field, and therefore the field decreases.

B:Doubling the number of turns in a solenoid doubles its magnetic field, and hence the field increases.

C:The magnetic field remains the same because the number of turns per length is unchanged.

Answer 1

C

Step-by-step explanation:

the magnetic field remain the same because the number of turn per unit length is unchanged