Welcome to the Quiz!
This quiz contains 15 questions from a mix of 1 subtopics.
According to Faraday's law, the induced e.m.f. is directly proportional to:
both A and C
the rate of change of flux linkage
the number of turns in the coil
the total flux linkage
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Which of the following factors does not affect the magnitude of the induced e.m.f.?
the area of the coil
the resistance of the conductor
the number of turns in the coil
the rate of change of flux linkage
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The magnetic flux through an area perpendicular to the magnetic field is given by:
φ = B A
φ = B - A
φ = B / A
φ = B + A
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A coil with 50 turns experiences a change in flux from 4 mWb to 1 mWb over 0.6 seconds. What is the induced e.m.f.?
0.50 V
0.75 V
1.00 V
0.25 V
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A coil with 150 turns is placed in a magnetic field of 0.4 Tesla. The coil's area is 0.2 m2. If the coil is rotated from a perpendicular position to a parallel position in 0.3 seconds, what is the average induced e.m.f. during this period?
40 V
50 V
20 V
30 V
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Which of the following statements about the induced e.m.f. is true?
it allows a current to flow if the conductor is part of an open circuit
it allows a current to flow if the conductor is part of a complete circuit
it prevents a current from flowing in the conductor
it has no effect on the current in the conductor
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If the number of turns in a coil is doubled, the induced e.m.f. will:
quadruple
remain the same
double
halve
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A conductor experiences a change in flux linkage from 6 mWb to 2 mWb in 0.8 seconds. If the induced e.m.f. is 5 mV, how many turns does the conductor have?
4
2
1
3
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Explain the process by which an e.m.f. is induced in a conductor moving through a magnetic field.
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Describe the factors that influence the magnitude of the induced e.m.f. according to Faraday's law.
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A coil with 50 turns is placed in a uniform magnetic field. The magnetic flux density is 0.02 Tesla, and the area of the coil is 0.1 m^2. If the coil is rotated from a position where it is perpendicular to the magnetic field to one where it is parallel in 0.1 seconds, calculate the average induced e.m.f. during this period.
1 V
10 V
0.01 V
0.1 V
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A solenoid with 200 turns experiences a decrease in magnetic flux from 3 mWb to 1 mWb over 2 seconds. Calculate the induced e.m.f. in the solenoid.
0.5 V
2 V
1 V
0.2 V
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A magnetic field with a flux density of 0.04 Tesla is perpendicular to a coil of 150 turns. The coil's area is 0.05 m2. If the magnetic flux density doubles in 0.25 seconds, what is the induced e.m.f.?
-2.4 V
-0.6 V
-1.2 V
-0.24 V
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Calculate the induced e.m.f. in a coil of 100 turns when the magnetic flux through the coil changes from 0.5 mWb to 2.5 mWb in 1 second.
-5 V
-0.5 V
-2 V
-0.2 V
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A rectangular coil of 120 turns is placed perpendicular to a magnetic field of 0.03 Tesla. The coil, having an area of 0.2 m^2, experiences a decrease in the magnetic field to 0 Tesla in 0.4 seconds. Calculate the induced e.m.f.
1.8 V
3 V
0.9 V
1.5 V
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