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