Download Chapter 5 Test

Name: ______________________________
Williams
Date: _____/_____/_____
Block: _____
PHYSICS
Refer to pages 556 – 573 of your textbook. As you read, fill in the blanks with a word or phrase that best fits.
Chapter 24: Magnetic Fields
I. General Properties of Magnets
A. Magnetic Poles
1) Magnets are ____________________ with two ends. One end is called the _____-pole and the other
end is called the _____-pole.
2) Two alike poles will __________ each other while two unlike poles will __________ each other.
B. How Do Magnets Affect Other Materials
1) Magnets can __________ many other __________ materials that are not magnetic.
2) These materials become ____________________ magnetized when in contact with a magnet.
3) The magnetism ____________________ when the object is pulled away from the magnet.
C. Permanent Magnets
1) Many magnets are made up of an iron alloy called ____________________, which is made up of
_____% aluminum, _____5 nickel, and _____% cobalt.
2) Rare earth elements like ____________________ and ____________________ can produce
permanent magnets that are extremely strong for their size.
II. Magnetic Fields Around Permanent Magnets
A. Magnetic fields are similar to both ____________________ and ____________________ fields.
B. Magnetic Field Lines
1) Imaginary lines that can provide a measure of _______________.
a) The number of field lines passing through a surface is called the _________________________.
b) The flux per unit area is ____________________ to the magnetic field strength.
2) Outside of a magnet the field lines come out of the __________ pole and enter the __________ pole.
3) Inside the magnet, field lines flow from __________ to __________ forming closed loops.
III. Electromagnetism
A. Magnetic Field Near a Current-Carrying Wire
1) The force of the magnetic field is ____________________ to the direction of the current in a wire.
2) The strength of the field is ____________________ to the current and varies ___________________
with the distance from the wire.
3) When using the first right-hand rule, your __________ points in the direction of the current and your
_______________ point in the direction of the magnetic field.
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Name: ______________________________
Williams
Date: _____/_____/_____
Block: _____
PHYSICS
B. Magnetic Fields Near a Coil
1) A _______________ is a long coil of wire consisting of many loops.
2) A solenoid becomes an ____________________ when a current is passed through the coil.
3) The strength of the field of an electromagnet is proportional to both the _______________ in the coil
and the number of __________ in the coil.
4) When using the second right-hand rule, your _______________ point in the direction of the current
and your __________ points toward the North Pole of the electromagnet.
IV. Magnetic Domains
A. Each _______________ in an atom acts like a tiny electromagnet.
B. A domain can consist of __________ individual atoms.
C. A domain’s size is still relatively small, ranging from _____ to __________ microns.
V. Forces on Currents in Magnetic Fields
A. ______________________________ discovered that the force on a wire is perpendicular to both the
______________________________ and the direction of the _______________.
B. When using the third right-hand rule, your _______________ points in the direction of the magnetic
field, your __________ points in the direction of the current, and your __________ faces the direction of
the force.
C. Force on a Wire Resulting From A Magnetic Field
1) The magnitude of the force is represented by the following equation:
2) F is __________ measured in N (newtons), B is ___________________________________
measured in T (teslas), I is _______________ measured in A (amperes), and L is the __________ of
the wire measured in m (meters).
VI. Galvanometers
A. A galvanometer is a device used to ______________________________________________________.
B. An electric motor converts _______________ energy to ____________________ energy.
VII.
The Force on a Single Charge Particle
A. The force produced by a magnetic field on a single electron depends on the electron’s _____________.
B. The magnitude of the force is represented by the following equation:
C. F is __________ measured in N (newtons), B is ___________________________________ measured
in T (teslas), q is _______________ in C (coulombs), and v is the _______________ measured in m/s
(meters per second).
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