| A ring of radius R is placed in the plane with its centre at origin and its axis along the x-axis and having uniformly distributed positive charge. A ring of radius \[r\left( <<R \right)\] and coaxial with the larger ring is moving along the axis with constant velocity then the variation of electrical flux \[\left( \phi \right)\] passing through the smaller ring with position will be best represented by : |
 |
A)
B)
C)
D)
Correct Answer: C
Solution :
\[\phi =\vec{E}\cdot \overrightarrow{ds}\] since r <<R so we can consider electric field is constant throughout the surface of smaller ring, hence \[\phi \propto \vec{E}\propto \frac{x}{{{({{R}^{2}}+{{x}^{2}})}^{3/2}}}\] So, the best represnted graph is C.
You need to login to perform this action.
You will be redirected in
3 sec
