- 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. | \(20~\text{Wb}\) |
Subtopic: Â Mutual Inductance |
 87%
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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 |
 88%
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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 |
 79%
From NCERT
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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 |
 82%
From NCERT
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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 |
 72%
From NCERT
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- 1(current)
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