Physics Principles and Problems 2009

Section 24.2 : Forces Caused by Magnetic Fields

Self-Check Quizzes

1
What is the third right-hand rule used for?
A)to determine direction of the magnetic field created by a current-carrying wire
B)to determine direction the sound will come out of a loudspeaker.
C)to determine direction of the current in a solenoid
D)to determine direction of the force on a current-carrying wire in a magnetic field.
2
In a loudspeaker, how is pitch determined?
A)by the rate at which the current in the coil changes direction.
B)by the number of turns of wire in the coil
C)by the strength of the magnetic field
D)by the size of the paper cone
3
What is a galvanometer used to measure?
A)strong magnetic fields
B)very small currents
C)number of coils in a solenoid
D)force on a wire in a magnetic field
4
In the equation F = qvB, what does v represent.
  Need a Hint?
A)charge
B)field strength
C)variable current
D)velocity
5
How are data retrieved from magnetic storage media?
A)Magnetized bands in the disk induce current in the coil.
B)The direction of current in a wire coil causes magnetic domains to line up in certain directions.
C)The motion of a charged particle causes electric current in a magnetic field.
D)Electrons are deflected to strike a magnetic material in specific locations.
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