Question

The magnetic field of solenoid can not be increased by:

विकल्प

• increasing the number of turns in the solenoid.

• increasing the strength of current flowing through the solenoid.

• placing a stainless steel core within the solenoid.

• placing a laminated soft iron core within the solenoid.

Answer 1

Placing a stainless steel core within the solenoid.

Explanation:

The magnetic field of a solenoid increases with more turns, more current, and a soft iron or laminated soft iron core. Stainless steel is not a soft magnetic material like soft iron, so it does not increase the magnetic field.