Two circuits have coefficient of mutual induction of $$0.09$$ henry. Average emf 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: Â 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: Â 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 emf generated in the secondary coil is $$1000~\text{V}$$. 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: Â 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: Â 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. $$1\times 10^{-3}~\text{Wb}$$
2. $$10\times 10^{-3}~\text{Wb}$$
3. $$20\times 10^{-3}~\text{Wb}$$
4. $$30\times 10^{-3}~\text{Wb}$$

Subtopic: Â 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 $$I_{0}=10~\text{A}$$ and $$\omega = 100\pi ~\text{rad/s}$$. The maximum value of emf induced in the second coil is:
1. $$5\pi~\text{V}$$
2. $$2\pi~\text{V}$$
3. $$4\pi~\text{V}$$
4. $$\pi~\text{V}$$

Subtopic: Â 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: Â 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 $$50\sin(500 t)$$ is passed in one of the coils, then the peak value of induced emf in the secondary coil will be:
 1 $$5000$$ V 2 $$500$$ V 3 $$150$$ V 4 $$125$$ V
Subtopic: Â Mutual Inductance |
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A small square loop of wire of side $$l$$ is placed inside a large square loop of side $$L$$ $$(L>>l)$$. If the loops are coplanar and their centres coincide, the mutual inductance of the system is directly proportional to:
 1 $$\dfrac{L}{l}$$ 2 $$\dfrac{l}{L}$$ 3 $$\dfrac{L^2}{l}$$ 4 $$\dfrac{l^2}{L}$$
Subtopic: Â 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. $$5.0~\text{H}$$
2. $$5.0\times 10^{-4}~\text{H}$$
3. $$2.5~\text{H}$$
4. $$2.5\times 10^{-4}~\text{H}$$

Subtopic: Â Mutual Inductance |
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