Two circuits have coefficient of mutual induction of 0.09 henry. Average e.m.f. induced in the secondary by a change of current from 0 to 20 ampere in 0.006 second in the primary will be:
1. 120 V
2. 80 V
3. 200 V
4. 300 V

Subtopic:  Mutual Inductance |
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A pair of adjacent coils has a mutual inductance of 1.5 H. If the current in one coil changes from 0 to 20 A in 0.5 s, what is the change of flux linkage with the other coil?

1. 35 Wb

2. 25 Wb

3. 30 Wb

4. 20 Wb

Subtopic:  Mutual Inductance |
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With the decrease of current in the primary coil from 2 A to zero in 0.01 s, the e.m.f. generated in the secondary coil is \(1000~\mathrm{V}\). The mutual inductance of the two coils is:

1. 1.25 H

2. 2.50 H

3. 5.00 H

4. 10.00 H

Subtopic:  Mutual Inductance |
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The coefficient of mutual inductance between two coils depends upon:

1. medium between coils
2. separation between coils
3. orientation of coils
4. All of these

Subtopic:  Mutual Inductance |
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Two coils of 10 turns each are arranged such that the mutual inductance between them is 150 mH. The magnetic flux linked through one coil when 2 amperes current will flow in another coil, will be:

1.  1×10-Wb 

2.  10×10-Wb 

3.  20×10-Wb 

4.  30×10-Wb 

Subtopic:  Mutual Inductance |
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Two coils have a mutual inductance of 5 mH. The current changes in the first coil according to the equation \(I=I_{0}cos\omega t,\) where \(I_{0}=10~A\) and ω = 100π rad/s. The maximum value of e.m.f. induced in the second coil is:

1. 5π Volt

2. 2π Volt

3. 4π Volt

4. π Volt

Subtopic:  Mutual Inductance |
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Two circular coils can be arranged in any of the three situations shown in the figure. Their mutual inductance will be:

1. maximum in the situation (A).
2. maximum in the situation (B).
3. maximum in the situation (C).
4. the same in all situations.

Subtopic:  Mutual Inductance |
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Two coaxial coils are very close to each other and their mutual inductance is 5 mH. If a current 50 sin 500t is passed in one of the coils, then the peak value of induced e.m.f. in the secondary coil will be:

1. 5000 V 2. 500 V
3. 150 V 4. 125 V
Subtopic:  Mutual Inductance |
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A small square loop of wire of side 'l' is placed inside a large square loop of side 'L' (Ll). If the loops are coplanar and their centres coincide, the mutual inductance of the system is directly proportional to:

1. L/l

2. l/L

3. L2/l

4. l2/L

Subtopic:  Mutual Inductance |
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A straight solenoid has 50 turns per cm in primary coil and 200 turns in the secondary coil. The area of cross-section of the solenoid is 4 cm2. Calculate the mutual inductance.

1. 5.0 H

2. 5.0×10-4 H

3. 2.5 H

4. 2.5×10-4 H

Subtopic:  Mutual Inductance |
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