Question

Consider a solenoid carrying supplied by a source with a constant emf containing iron core inside it. When the core is pulled out of the solenoid, the change in current will ______.

Options

• remain same

• decrease 

• increase

• modulate

Answer 1

Consider a solenoid carrying supplied by a source with a constant emf containing iron core inside it. When the core is pulled out of the solenoid, the change in current will decrease.

Explanation:

`phi  alpha ` I

When the solenoid is taken out, the flux is reduced. As a result, the value of current decreases.