Electric charges +10μC,+5μC,−3μC and +8μCare placed at the corners of a square of side √2m. The potential at the centre of the square is:
1.8×105
1.8
1.8×106
18×105
A
1.8
B
1.8×106
C
1.8×105
D
18×105
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Solution
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We know potential =kQr Now potential at centre due to all charges =k(10μc+5μc−3μc+8μc)1m
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