Question 11 : Which, among the following, is the correct formula to find the coupling coefficient?
1. k=M/sqrt(L1L2)
2. k=M/sqrt(L1²)
3. k=M/sqrt(L2²)
4. k=M/(L1L2)
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Question 12 : Can the coupling coefficient practically ever be equal to 1?
1. Yes
2. No
3. Depends on the current in coil 1
4. Depends on the current in coil 2
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Question 13 : What is the coupling coefficient when there is ideal coupling?
1. 0
2. 100
3. 1
4. Insufficient information provided
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Question 14 : What is the coupling coefficient when all the flux of coil 1 links with coil 2?
1. 0
2. 100
3. 1
4. Insufficient information provided
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Question 15 : The types of inductors are ____________
1. Fixed and variable
2. Only fixed
3. Only variable
4. Neither fixed nor variable
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Question 16 : Practical application of mutual inductance is ____________
1. DC generator
2. AC generator
3. Transformer
4. Capacitor
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Question 17 : The flux linkage in coil 1 is 3 Wb and it has 500 turns and the current in coil 2 is xA, calculate the value of x if the mutual inductance is 750H.
1. 1A
2. 2A
3. 3A
4. 4A
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Question 18 : The flux linkage in coil 1 is x and it has 500 turns and the current in coil 2 is 2A, calculate the value of x if the mutual inductance is 750H.
1. 1Wb
2. 2Wb
3. 3Wb
4. 4Wb
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Question 19 : The flux linkage in coil 1 is 3Wb and it has x turns and the current in coil 2 is 2A, calculate the value of x if the mutual inductance is 750H.
1. 300
2. 400
3. 500
4. 700
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Question 20 : If the flux linkage in coil 1 is 3Wb and it has 500 turns and the current in coil 2 is 2A, calculate the mutual inductance.
1. 750H
2. 500H
3. 450H
4. 900H
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