At a point in an electrostatic field the potential is 400 V

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

At a point in an electrostatic field the potential is 400 V. A test charge of +2 μC kept there has potential energy U₁. If the test charge is replaced by +6 μC, which of the following statements is correct? (a) U2=3U1 and the potential becomes 1200 VU_2 = 3U_1 \text{ and the potential becomes } 1200\,\text{V} (b) U2=U1 and the potential remains 400 VU_2 = U_1 \text{ and the potential remains } 400\,\text{V} (c) U2=3U1 and the potential remains 400 VU_2 = 3U_1 \text{ and the potential remains } 400\,\text{V} (d) U2=9U1 and the potential remains 400 VU_2 = 9U_1 \text{ and the potential remains } 400\,\text{V}

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