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What do you need to make an electromagnet? How are the magnetic domains of an unmagnetized material lined up? If you cut a magnet in half, how many north poles and south poles will it have? N S A magnetic field is created by moving ____________. What is alternating current? If current flows through a wire, it can create a______ ______ (two words). How does a generator convert energy? True or False? An electromagnet can be increased by reversing the current. Where is the force around a magnet the strongest? Through what is a magnetic force exerted? Moving a magnet in and out of a coil of wire produces a _______________. How do the coils of a transformer affect the voltage? What does the Earth’s magnetic field interact with during an aurora? With what does a compass needle align itself? True or False? The sun emits charged particles. True or False? Most of the sun’s particles are deflected by Earth’s magnetosphere. True or False? Some of the charged particles from the sun reach Earth’s poles where they contact the atmosphere. How does a magnet affect a compass? How does a transformer change voltage? Why? Compare motors and generators.