Question

Strength of a solenoid can be increased by
a. Increasing electric current through solenoid.
b. Increasing the number of turns per unit length of the solenoid coil.
c. Increasing electric current through solenoid and the number of turns per unit length
of the solenoid coil.
d. None of the above.​

Answer 1

Answer:

The strength of a solenoid can be increased by increasing the number of turns. The magnetic field due to a solenoid is similar to the magnetic field produced by a bar magnet.

Explanation:

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Answer 2

Answer:

c.Increasing electric current through solenoid and the number of turns per unit length

of the solenoid coil.