Questions
Three charges Q, + q and +q are placed at the vertices of a right-angled isosceles triangle as shown. The net electrostatic energy of the configuration is zero if Q is equal to
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Correct option is B
Net electrostatic energy U=kQqa+kq2a+kQqa2=0⇒kqaQ+q+Q2=0⇒Q=−2q2+2Similar Questions
Two charges q1 and q2 are placed 30 cm apart, shown in the figure. A third charge q3 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
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