Given below are two statements:
Assertion (A): | No electric current will be present within a region having a uniform and constant magnetic field. |
Reason (R): | Within a region of uniform and constant magnetic field the path integral of the magnetic field along any closed path is zero. Hence from ampere circuital law \(\varphi \overrightarrow{\mathrm{B}} \cdot \overrightarrow{\mathrm{dl}}=\mu_0 1\) (where the given terms have usual meaning), no current can be present within a region having a uniform and constant magnetic field. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
The correct plot of the magnitude of the magnetic field \(\vec B\) vs distance \(r\) from centre of the wire is:
(if the radius of the wire is \(R\).)
1. | 2. | ||
3. | 4. |
A cylindrical conductor of radius \(R\) is carrying a constant current. The plot of the magnitude of the magnetic field \(B\) with the distance \(d\) from the centre of the conductor is correctly represented by the figure:
1. | 2. | ||
3. | 4. |
1. | 2. | ||
3. | 4. |