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NEET 2020 (Phase 2) · Electric Potential & Equipotentials

Electric Potential & Equipotentials question from NEET 2020 (Phase 2)

Q88NEET 2020 · PHASE 2Easy

Electric Potential & Equipotentials

The variation of electrostatic potential with radial distance $r$ from the centre of a positively charged metallic thin shell of radius $R$ is given by the graph

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Answer: (c)

For $r \le R$ : $E = 0$ , so $V = \frac{kQ}{R}$ is constant (flat line).
For $r > R$ : $V = \frac{kQ}{r}$ , falling as $\frac{1}{r}$ .
Graph (c) is flat up to $R$ and then falls as $1/r$ , so the answer is (c).

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