Multiple Choice
An electromagnet consists of a
A) bar magnet that carries an electric current.
B) coil of wire.
C) current-carrying coil with a piece of iron inside.
Correct Answer:

Verified
Correct Answer:
Verified
Related Questions
Q23: Compared with the voltage input to a
Q36: Unlike electric charges,magnetic poles cannot be<br>A)located.<br>B)isolated.<br>C)destroyed.
Q63: Compared with the current in the primary
Q88: An ideal transformer has 50 turns in
Q89: Magnetic field lines about a current-carrying wire<br>A)extend
Q91: An iron rod becomes magnetic when<br>A)positive ions
Q92: A transformer has an input of 6
Q95: No magnetic force acts on a current
Q107: Earth's magnetic field affects cosmic rays by<br>A)deflecting
Q121: The rate at which a transformer transfers