Question

Which changes will cause an increase in the magnetic field of a solenoid? Check all letters 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

Answer 1

A) using more wire loops

C) using a larger current

F) decreasing the spacing between loops

Answer 2

Explanation :

The magnetic field due to a solenoid is given as :

$B=\mu_onI$

where,

$\mu_o$ 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).