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Electromagnetism Exit ticket
By Sandra Kuhn
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Last updated about 1 year ago
12 questions
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Question 1
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Question 2
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Question 3
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Question 4
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Question 5
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Question 6
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Question 7
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Question 8
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Question 9
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Question 10
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Question 11
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Question 12
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What energy conversion takes place in a motor?
Magnetic to electrical
Kinetic to electrical
Magnetic to kinetic
Electrical to kinetic
The direction of rotation of a dc motor can be changed by
changing the battery orientation
changing the orientation of the magnets
both of these will work
neither of these will work
Which of the following is not a function of the split-ring commutator?
The brushes allow for free rotation of the coil
The current is stopped every 180° to prevent jamming
The current direction is switched in the coil every 180°
Alternating current to direct current
A straight current-carrying conductor is carrying electrons into the page.
What is the direction of the magnetic field around the conductor?
circular and anticlockwise
moving apart
moving together
circular and clockwise
A stream of protons is being carried in a channel that goes perpendicularly into the page.
What is the direction of the magnetic field around the channel?
circular and anticlockwise
moving apart
moving together
circular and clockwise
A straight current-carrying conductor is carrying conventional current out of the page.
What is the direction of the magnetic field around the conductor?
moving together
circular and anticlockwise
circular and clockwise
moving apart
In which direction is this wire moving?
Towards 1
Towards 2
Towards 4
Towards 3
In what direction does this motor turn?
does not turn as the angle is 90
0
clockwise
does not turn as it requires a slip ring to function and not a split ring commutator
anticlockwise
Where will the induced North pole of this solenoid be relative to the solenoid?
above
left
right
below
When a bar magnet is pushed N pole first into a solenoid, the needle of a galvanometer connected to the solenoid moves to the right.
The needle will move to the left when the magnet is then .... (select all that may apply)
pulled out the bottom
pulled back out the top
held stationary
Flux depends on ....
field strength
the area
the angle between the field and the surface
all of these
The magnitude of any induced emf is proportional to
the rate of change of current
the rate of change of voltage
the rate of change of magnetic flux linkage
the rate of change of resistance