a. A microphone b. A generator c. A galvanometer d. A motor e. None of the above.
a. Its terminals b. Its north and south poles c. Its magnetic fields d. Its electromagnetic poles e. None of the above
a. Unlike attract and the same type repel b. Both are plus and minus c. Magnetic poles attract electrons d. Both change positive to negative charges e. None of the above
a. That current can flow through the filings b. That paper distorts magnetism c. That magnetic fields are counter clockwise d. The pattern of a magnetic force field e. None of the above
a. Use a compass near a wire with current flowing through it b. Only magnets create magnetic fields c. Move a wire through a magnetic field d. Connect a battery to the magnetic field e. None of the above
a. Attach a natural magnet to a battery b. Run current through a wire wrapped around an iron rod c. Line up the N and S poles of a magnet with an electric wire d. Wrap a magnet around a piece of wire with current flowing through it. e. None of the above
a. The magnetism is turned off b. The current keeps flowing because of the magnetic force c. The electromagnet reverses its polarity d. The electromagnet becomes a generator e. None of the above
a. Attach a magnet to a battery b. By putting a current through a wire around a magnet c. By moving a wire through a magnetic field d. You can't, because only friction on electric charges creates electricity e. None of the above
a. The motor would become an electromagnet b. Nothing, because you need electricity to spin it c. You would heat up the coils d. You would create electricity e. None of the above
a. No, because only friction on electric charges or batteries create electricity. b. Yes, by moving a wire through a magnetic field c. Yes, by putting a current through a wire around a magnet d. Yes because magnets use electricity to stay effective e. None of the above.