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Question
A long cylindrical shell carries positive surface charge σ in the upper half and negative surface charge - σ in the lower half. The electric field lines around the cylinder will look like figure given in:
A long cylindrical shell carries positive surface charge σ in the upper half and negative surface charge - σ in the lower half. The electric field lines around the cylinder will look like figure given in:
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Solution
The correct option is A
We can consider the shell to be a dipole. So, at the equatorial points the electric lines should be downwards. Also, the field lines should start from the positive terminal and end at the negative terminal. The electric field lines should be smooth and continuous. Figure (1) satisfies all the required conditions.
We can consider the shell to be a dipole. So, at the equatorial points the electric lines should be downwards. Also, the field lines should start from the positive terminal and end at the negative terminal. The electric field lines should be smooth and continuous. Figure (1) satisfies all the required conditions.