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Worksheets10A Physics Term 3 Pop Quiz 2
Total questions: 10
Worksheet time: 30mins
Fill in the blank:
Magnetic field is area of magnetic influence on moving _________, currents and magnetic materials.
electric charges
energy
poles
matter
What do opposite poles of magnet do?
repel
attract
push apart
it does nothing and there is no force produced
When using the first Right-Hand Rule to determine the direction of magnetic field around a current carrying wire, the thumb should point in the same direction as_________?
current
magnetic domain
magnetic field
magnetic force
How can you increase the strength of an electromagnet?
decrease the current that flows through
increase the length of the coil
increase the number of coils
all of the above
How does the strength of a magnetic field that is 1 cm from a current carrying wire compare with a strength of the field 3 cm from the wire?
twice as strong
four times as strong
same strength
three times as strong
A straight wire carrying a current of 7.2 A has a field of 8.9×10−3 T perpendicular to it. What length of wire in the field will experience a force of 2.1 N?
0.3m
1.3m
0.26m
33m
Assume that a 19 cm length of wire is carrying a current perpendicular to a 4.1 T magnetic field and experiences a force of 7.6 mN. What is the current in the wire?
9.8×10−3 A
0.98×10−3
3.4×10−3
1×10−3
Which of the following is not a part of an electric motor?
magnet
diode
brushes
Which of the following converts electrical energy to mechanical energy?
electric charger
resistor
electric motor
coil
1.7 T
0.31T
0.017T
31T
