Which changes will cause an increase in the magnetic field of a solenoid? check all that apply.
a. using more wire loops
b. using fewer wire loops
c. using a larger current
d. using a smaller current
e. increasing the spacing between loops
f. decreasing the spacing between loops

The magnetic field due to a solenoid is given as : where, is the permeability of the medium. n is the number of turns or loops in the coil. I is the current flowing in the solenoid.

The magnetic field due to a solenoid can be increased by increasing the number of turns, current and placing an iron core inside the solenoid.

So, the correct option are:

(1) using more wire loops

(2) using a larger current

Hence, the correct options are (a) and (c).

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