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Question

Four charges +3μC,1μC,+5μC and 7μC are arranged on the circumference of a circle of radius 0.5m. The potential at the centre is :


  1. 288×103V
  2. Zero
  3. 18×104V
  4. 18×104V

A
Zero
B
18×104V
C
18×104V
D
288×103V
Solution
Verified by Toppr

We know potential is a scalar quantity net V at center is just sum of potential due to individual
V=k(3μC)r+k(1μC)r+k(5μC)r+k(7μC)r

V=kr(31+57)

V=0 volts.

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