First slide

Electrostatic potential

Question

The potential at a point, due to a positive charge of $100 μC$ at a distance of 9m, is

Moderate

A

$10^{4} V$
B

$10^{5} V$
C

$10^{6} V$
D

$10^{7} V$

Solution

By using $V = 9 \times 10^{9} \times \frac{Q}{r} = 9 \times 10^{9} \times \frac{100 \times 10^{- 6}}{9} = 10^{5} V$

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