Q. No.1. \(8~\mathrm{\mu J}\)
2. \(4~\mathrm{\mu J}\)
3. \(4~\mathrm{mJ}\)
4. \(8~\mathrm{mJ}\)
1. \(3.14\) V
2. \(31.4\) V
3. \(62.8\) V
4. \(6.28\) V
| 1. | \(0\) | 2. | \(2\) weber |
| 3. | \(0.5\) weber | 4. | \(1\) weber |
1. \(2~\text{A}\)
2. \(0.25~\text{A}\)
3. \(1.5~\text{A}\)
4. \(1~\text{A}\)
The current in an inductor of self-inductance \(4~\mathrm{H}\) changes from \(4~ \mathrm{A}\) to \(2~\mathrm{A}\) in \(1~ \mathrm s\) . The e.m.f. induced in the coil is:
1. \(-2~\mathrm V\)
2. \(2~\mathrm V\)
3. \(-4~\mathrm V\)
4. \(8~\mathrm V\)
The dimensions of mutual inductance \((M)\) are:
1. \([M^2LT^{-2}A^{-2}]\)
2. \([MLT^{-2}A^{2}]\)
3. \([M^{2}L^{2}T^{-2}A^{2}]\)
4. \([ML^{2}T^{-2}A^{-2}]\)
An inductor coil of self-inductance \(10~\mathrm H\) carries a current of \(1~\mathrm A\) . The magnetic field energy stored in the coil is:
| 1. | \(10~\mathrm J\) | 2. | \(2.5~\mathrm J\) |
| 3. | \(20~\mathrm J\) | 4. | \(5~\mathrm J\) |
\(\phi=2t^3+4t^2+2t+5\) Wb.
The magnitude of induced emf in the coil at \(t=5\) s is:
1. \(108\) V
2. \(197\) V
3. \(150\) V
4. \(192\) V
Two conducting circular loops of radii R1 and R2 are placed in the same plane with their centres coinciding. If R1 >> R2, the mutual inductance M between them will be directly proportional to
(1) R1/R2
(2) R2/R1
(3)
(4)
Two conducting circular loops of radii are placed in the same plane with their centres coinciding. If , the mutual inductance M between them will be directly proportional to:
1.
2.
3.
4.
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