# Shared Flashcard Set

## Details

Chapter 36: Magnetism Questions
Chapter 36 Magnetism Questions
13
Physics
01/15/2012

Term
 Electric charges produce electric force; magnetic poles produce ______________ ___________.
Definition
 Magnetic forces
Term
 Can or cannot. Electric charges can be isolated, magnetic poles ___________ be isolated.
Definition
 cannot, A north magnetic pole never exists without the presence of a south pole.
Term
 An electric charge is surrounded by an electric field. If an electric charge is moving, it is surrounded by an electric field and a ________________ field.
Definition
 magnetic
Term
 T or F. A magnetic field is a by-product of an electric field in motion.
Definition
 T
Term
 Where is the motion of an electric charge in a bar magnet?
Definition
 Every spinning electron in a magnet is a tiny magnet. Since the magnetite has atoms oriented in the same direction-a magnet is formed with a strong magnetic field.
Term
 Name a microscopic cluster of atoms that have their magnetic fields aligned.
Definition
 Magnetic domain.
Term
 Does an electric current produce a magnetic field?
Definition
 Yes-A moving charge produces a magnetic field.
Term
 A current-carrying coil of wire with many loops is called a(n) _______________.
Definition
 electromagnet
Term
 What happens to a wire with no current flowing through it when it is placed inside a Horseshow magnet?
Definition
 Nothing.
Term
 What happens to a current carrying wire when it is passed through a magnetic field?
Definition
 It is deflected up or down, ┴ to the magnetic field lines.
Term
 The earth is a large magnet. When charged particles of cosmic radiation enter earth’s atmosphere what happens to them?
Definition
 Cosmic radiation (mostly + particles) is deflected near the equator because the magnetic field lines are ┴ to the incoming particle. Cosmic radiation is allowed to enter at the North (Aurora Borealis) and South (Aurora Austral is) Poles, because the magnetic field lines are ║to the incoming particle. At the poles, (-) particles are responsible for the Aurora phenomenon.
Term
 A magnet produces a _________ on a current-carrying wire, so a current-carrying wire produces a _________ on a magnet?
Definition
 forceforce
Term
 The discrepancy between the orientation of a compass and true north is known as ____________ ___________.
Definition
 magnetic declination
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