\(\mathrm A.\) | hold the sheet there if it is magnetic. |
\(\mathrm B.\) | hold the sheet there if it is non-magnetic. |
\(\mathrm C.\) | move the sheet away from the pole with uniform velocity if it is conducting. |
\(\mathrm D.\) | move the sheet away from the pole with uniform velocity if it is both, non-conducting and non-polar. |
1. | \(0.125 \pi~ \text{mV}\) | 2. | \(125 \pi ~\text{mV}\) |
3. | \(125 \pi~\text{V}\) | 4. | \(12.5 \pi~\text{mV}\) |
1. | \(0\) | 2. | \(2\) weber |
3. | \(0.5\) weber | 4. | \(1\) weber |
The current in an inductor of self-inductance \(4~\text{H}\) changes from \(4~ \text{A}\) to \(2~\text{A}\) in \(1~ \text s\). The emf induced in the coil is:
1. \(-2~\text{V}\)
2. \(2~\text{V}\)
3. \(-4~\text{V}\)
4. \(8~\text{V}\)