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.   

2.   

3.   

4.   

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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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 $\omega$ = 100$\pi$ rad/s. The maximum value of e.m.f. induced in the second coil is:

1. 5$\pi$ Volt

2. 2$\pi$ Volt

3. 4$\pi$ Volt

4. $\pi$ Volt

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' (L$\gg$l). 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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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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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.

3. 2.5 H

4.

Subtopic:  Mutual Inductance |
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