Question

Which factors directly affect the magnetic force produced by an electromagnet?(1 point)
Responses

number of turns in the wire, amount of current
number of turns in the wire, amount of current

length of core, number of turns in the wire
length of core, number of turns in the wire

amount of current, type of force
amount of current, type of force

amount of current, length of core

Answer 1

number of turns in the wire, amount of current

Explanation: the magnetic field (and thus magnetic force) of an electromagnet is proportional to the current (I) and the number of turns (N) — roughly B ∝ μ (N/L) I — so increasing N or I increases the field.