- 1(current)
Q. No.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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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 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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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. \(5\pi\) Volt
2. \(2\pi\) Volt
3. \(4\pi\) Volt
4. \(\pi\) Volt
Subtopic: Â Mutual Inductance |
 80%
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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. \(\frac{L}{l}\)
2. \(\frac{l}{L}\)
3. \(\frac{L^2}{l}\)
4. \(\frac{l^2}{L}\)
1. \(\frac{L}{l}\)
2. \(\frac{l}{L}\)
3. \(\frac{L^2}{l}\)
4. \(\frac{l^2}{L}\)
Subtopic: Â Mutual Inductance |
 71%
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