Electromagnetic Induction

Which describes Hans Oersted's work with electricity

• He discovered electromagnetic induction after seeing a compass needle deflected by a flowing electric current.

• He discovered electromagnetism after seeing a compass needle deflected by a flowing electric current.

• He discovered electromagnetic induction after seeing a changing magnetic field generate an electric current.

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Craig is modeling the discovery of electromagnetism. Which procedure should he use?

• moving a magnet into a coil of wire in a closed circuit

• Moving a magnet into a coil of wire in an open circuitf

• bringing a compass near a wire that has an electric current

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The generation of a magnetic field by an electric current is

• electromagnetism

• electricity

• solenoid

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Four compasses are placed around a wire as shown. What is the best conclusion that can be drawn?

• a current flows up the wire

• a current flows down the wire

• a current does not flow in the wire

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Which will produce a magnetic field

• any wire with or without a current

• a wire formed into a coil

• a wire carrying a current

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Which describes the magnetic field produced by the current?

• straight lines along the wire to the right moving the same direction of the current

• straight lines along the wire to the left moving the opposite direction of the current

• circles around the wire that go in at the bottom of the screen and moves in a clockwise direction

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Which describes Michael Faraday's work with electricity and magnetism?

• He discovered electromagnetic induction after seeing a compass needle deflected by a flowing electric current

• he discovered electromagnetic induction after seeing a changing magnetic field generate an electric current

• he discovered electromagnetism after seeing a changing magnetic field generate an electric current

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Tonya is modeling the discovery of electromagnetic induction. Which procedure should she use?

• moving a magnet into a coil of wire in a closed circuit

• moving a magnet into a coil of wire in an open circuit

• bringing a compass near a wire that has no electric current

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When the north pole of a bar magnet is moved into a solenoid, the needle on a galvanometer attached to the solenoid moves to the left, indicating that a current is produced. The magnet is then pulled out at a faster speed. What will be the result?

• a larger current in the same direction

• a larger current in the opposite direction

• a smaller current in the same direction

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Julia produces a 2 mA current by moving the south pole of a bar magnet into a solenoid. The solenoid contains 150 loops of wire. Which change should Julia make to generate a larger current?

• moving the magnet slower

• using more loops of wire in the coil

• using the north pole of the magnet

• setting the magnet down in the solenoid

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