7.3 Motional EMF
Quiz by Maitha Rashed
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8 questions
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- Q1No EMF is induced when?When no lines are cut by the wireWhen the wire is parallel to the magnetic field directionWhen the wire is not movingAll of the above20s
- Q2EMF induced in a circuit according to Faraday's Law depends onRate of change of magnetic fluxMaximum magnetic fluxChange in magnetic fluxInitial magnetic flux20s
- Q3When the rate of change of flux associated with a conductor is doubled, then EMF induced is -----DoubledNone of the abovehalvedzero20s
- Q4A 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 toThe change in the magnetic field strengthThe change in the currentThe change in the enclosed area in the magnetic fieldthe resistance of the circuit20s
- Q5Find 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 conductorMotional emf is inversely proportional to the magnetic field.20s
- Q6Which of the following is found using Lenz’s law?Induced emf.The direction of alternating current.Induced current.The direction of induced emf.20s
- Q7Determine the direction of induced current if the magnetic field is increasing.Out of the page.No induced Current.CounterclockwiseClockwise20s
- Q8Determine the direction of induced current if the magnetic field is constant.CounterClockwiseClockwiseNo induced currentNone of the above.20s
