Science 6 Chapter 11 Test Set B Question Preview (ID: 37369)
Electricity And Magnetism.
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A maglev train floats above its rails due to
a) magnetic force
b) electricity
c) electric motors
d) magnetic field lines
A galvanometer is a device that measures small
a) magnetic fields
b) currents
c) motors
d) changes in solenoid loops
When a wire moves up or down repeatedly in a(n) __________, an alternating current is induced.
a) blender
b) magnetic field
c) bar magnet
d) solenoid
A step up transformer is one that increases
a) magnetism
b) size
c) voltage
d) galvanometer readings
A strong magnet that can be turned on and off is called
a) a solenoid
b) a motor
c) an electromagnet
d) a bar magnet
A magnetic pole is the part of a magnet where the magnetic effect is the weakest.
a) True
b) False: Change weakest to strongest.
c) False: Change pole to field
d) False: Change magnetic effect to electric current
A compass behaves as it does because the moon acts as a giant magnet.
a) True
b) False: Change compass to astrolabe
c) False: Change moon to Earth
d) False: Change magnet to gravitational center.
A DC generator is like an AC generator except that it contains a commutator instead of slip rings.
a) True
b) False: Change commutator to brush
c) False: Change slip rings to armature
d) False: Change slip rings to brushes
Increasing the number of loops in a solenoid will cause the strength of its magnetic field to decrease.
a) True
b) False: Change solenoid to electromagnet
c) False: Change loops to ferromagnetic cores.
d) False: Change decrease to increase.
Magnets attract iron.
a) True.
b) False: Change magnets to solenoids.
c) False: Change iron to metals.
d) False: Change attract to repel.
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