7.3 Motional EMF

Quiz by Maitha Rashed

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8 questions
• Q1
No EMF is induced when?
When no lines are cut by the wire
When the wire is parallel to the magnetic field direction
When the wire is not moving
All of the above
20s
• Q2
EMF induced in a circuit according to Faraday's Law depends on
Rate of change of magnetic flux
Maximum magnetic flux
Change in magnetic flux
Initial magnetic flux
20s
• Q3
When the rate of change of flux associated with a conductor is doubled, then EMF induced is -----
Doubled
None of the above
halved
zero
20s
• Q4
A conducting bar of length L is sliding with a constant velocity V along two conducting rails in the presence of a uniform magnetic field directed into the page. According to Faraday’s law, the emf induced across the ends of the bar is due to
The change in the magnetic field strength
The change in the current
The change in the enclosed area in the magnetic field
the resistance of the circuit
20s
• Q5
Find the true statement.
Motional emf is directly proportional to the magnetic field.
Motional emf is inversely proportional to the length of the conductor.
Motional emf is inversely proportional to speed of electric conductor
Motional emf is inversely proportional to the magnetic field.
20s
• Q6
Which of the following is found using Lenz’s law?
Induced emf.
The direction of alternating current.
Induced current.
The direction of induced emf.
20s
• Q7
Determine the direction of induced current if the magnetic field is increasing.
Out of the page.
No induced Current.
Counterclockwise
Clockwise
20s
• Q8
Determine the direction of induced current if the magnetic field is constant.
CounterClockwise
Clockwise
No induced current
None of the above.
20s

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