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Science 6 Chapter 11 Test Set A
Test Description: Electricity and Magnetism
Instructions: Answer all questions to get your test result.
1) Magnetic field lines around a bar magnet
A
cross back and forth over one another
B
spread out from one pole and curve around to the other
C
are only perpendicular to the magnet
D
are perfectly straight
2) Every magnet, regardless of its shape, has two
A
magnetic fields
B
magnetic poles
C
magnetic charges
D
magnetic needles
3) Magnetic poles that are unlike
A
attract each other
B
do not interact
C
repel each other
D
point in the same direction
4) What is one difference between a galvanometer and an electric motor?
A
An electric motor uses electrical energy.
B
A galvanometer uses electric current.
C
In an electric motor, the armature spins continuously.
D
An electric motor causes something to move.
5) To reverse the direction of a current in a motor, current is conducted
A
through the brushes to the commutator
B
through the commutator to the armature
C
through the armature
D
in the direction of rotation
6) The type of current produced by a battery is
A
direct current
B
alternating current
C
magnetic current
D
induced current
7) You can increase the strength of an electromagnet's field by
A
winding the coils more loosely
B
decreasing the number of loops in the solenoid
C
decreasing the current in the solenoid
D
using a stronger ferromagnetic material for the core
8) As Earth's magnetic poles move, the magnetic declination in a given location will
A
change
B
stay the same
C
switch to point south
D
return to zero
9) An electric current produces a(n)
A
magnetic field
B
solenoid
C
insulator
D
magnet
10) Electric current from a generating plant is
A
direct current transmitted at low voltages, but usually used at high voltages.
B
direct current transmitted at high voltages, but usually used at low voltages.
C
alternating current transmitted at high voltages, but usually used at low voltages.
D
alternating current transmitted at low voltages, but usually used at high voltages.
*select an answer for all questions
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