- 1(current)
Q. No.A pair of adjacent coils has a mutual inductance of \(1.5~\text H.\) If the current in one coil changes from \(0\) to \(20~\text A\) in \(0.5~\text s,\) what is the change of flux linkage with the other coil?
| 1. | \(35~\text{Wb}\) | 2. | \(25~\text{Wb}\) |
| 3. | \(30~\text{Wb}\) | 4. | \(20~\text{Wb}\) |
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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 |
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| 1. | \(5000\) V | 2. | \(500\) V |
| 3. | \(150\) V | 4. | \(125\) V |
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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. \(\pi~\text{V}\)
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| 1. | \(\dfrac{L}{l}\) | 2. | \(\dfrac{l}{L}\) |
| 3. | \(\dfrac{L^2}{l}\) | 4. | \(\dfrac{l^2}{L}\) |
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- 1(current)
Q. No.
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