First slide

Electrostatic potential

Question

Point charges $q_{1} = 2 μC and q_{2} = - 1 μC$ are kept at points x = 0 and x = 6 respectively. Electric potential will be zero at the points:

Easy

A

x = 1 and x = 5
B

x = 2 and x = 9
C

x = 4 and x = 12
D

x = -2 and x = 2

Solution

$For x_{1} \frac{{kq}_{1}}{x_{1}} + \frac{{kq}_{2}}{6 - x_{1}} = 0 \Rightarrow x_{1} = 4 cm For x_{2} \frac{{kq}_{2}}{x_{2}} + \frac{{kq}_{2}}{x_{2} - 6} = 0 \Rightarrow x_{2} = 12 cm$

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