Two charges q 1 and q 2 are placed 30 cm apart, as shown in the figure. A third charge q 3 is moved along the arc of a circle of radius 40 cm from C to D 
The change in the potential energy of the system is 
where k is
Text Solution
Verified by ExpertsThe correct answer is:
C
The potential energy when q 3 is at point C
The potential energy when q 3 is at point D
Thus change in potential energy is 
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