Question

An electromagnet is the most powerful type of magnet there is. It is a magnet with a current running through it that can be turned on and off. Why might it be useful to be able to turn the electromagnet on and off?(1 point)
Responses

to latch onto and let go of objects
to latch onto and let go of objects

to not waste electricity
to not waste electricity

to reduce wearing out of the magnet over time
to reduce wearing out of the magnet over time

to control the strength of the magnet

Answer 1

to latch onto and let go of objects

Turning the electromagnet off lets it release objects (and turning it on lets it pick them up), which is useful for cranes, relays, and other devices.