Exploring Electromagnetism and Motors
Authored by Brett Owers
Engineering
12th Grade
Used 1+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following best describes the motor effect?
The production of a magnetic field by a moving charge
The force experienced by a current-carrying conductor in a magnetic field
The generation of an electric current by a changing magnetic field
The attraction between two stationary magnets
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the direction of the force on a current-carrying conductor placed in a magnetic field determined by?
left hand palm rule
Righthand palm rule
Lenz’s law
Ohm’s law
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In an electric motor, what is the primary function of the commutator?
To increase the current
To reverse the direction of current in the coil every half turn
To generate a magnetic field
To reduce friction
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT an application of the motor effect?
Loudspeakers
Electric motors
Transformers
Galvanometers
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is electromagnetic induction?
The process of generating a magnetic field by a current
The process of generating an electric current by changing a magnetic field
The process of attracting iron objects using a magnet
The process of converting electrical energy to heat
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which law states that the induced current in a circuit will flow in such a direction as to oppose the change that produced it?
Faraday’s law
Lenz’s law
Ohm’s law
Ampère’s law
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