Pls answer this question

Explanation:

on the left side the forces add to 150N

on the right side the forces add to 300

you then take away 150 from 300

=150N to the right

answer Is C

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.