Physical Science 1.17: 4.2.1 Electromagnetism

Multiple Choice

A magnetic field forms around any _______ wire.

• copper

• straight

• current-carrying

Multiple Choice

The orientation of the magnetic field is always _______ to the current.

• perpendicular

• parallel

Multiple Choice

The direction of the magnetic field around a wire depends on the _______ .

• type of conductor

• direction of current

• voltage

Multiple Choice

Which of the following images shows the strongest electromagnet?

Multiple Choice

Which of the following actions will induce a current?

• A magnet moves through a wire coil.

• A wire is wrapped around a magnet.

• The opposite poles of two magnets are held at opposite ends of a wire.

Multiple Choice

Which factor will increase the voltage of an induced current?

• Using fewer loops of wire in the coil

• Using more loops of wire in the coil

• Moving the magnet in and out of the coil more slowly

Multiple Choice

Which of the following is the first step in how an electric generator works?

• An electric current is induced in the wire.

• The magnetic field exerts a force on the electric charges in the wire, creating a voltage.

• A wire loop is turned in the magnetic field of permanent magnets.