Two charges `q_(1)=+2xx10^(-8)C and q_(3)=-0.4xx10^(-8)C` are placed 60cm apart, as shown in fig. A third charge `q_(3)=+0.2xx10^(-8)C` is moved along the arc of a circle of radius 80 cm from C to D. Compute the percentage change in the energy of the system.

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 o fthe system is (q_(3))/(4pi epsilon_(0))k ., where k is

Two point charge q_(1) = -10xx10^(-6) C " and "q_(2)=15xx10^(-6) are 40 cm apart as shown in figure. Find the potential difference between the point P and Q.

Two charges -10C and + 10 C are placed 10 cm apart. Potential at the centre of the line joining the two charges is

Two point charges, q_(1)=10xx10^(-8)C and q_(2)=-2xx10-8C are separated by a distance of 60 cm in air. (i) Find at what distance from the 1st charge, q_(1) , would the electric potential be zero. (ii) Also calculate the electrostatic potential energy of the system.

If point charges Q_(1) = 2xx 10^(-7) C and Q_(2) = 3 xx 10^(-7) C are at 30 cm separation, then find electrostatic force between them

Two point charges q_(1)=2xx10^(-3) C and q_(2)=-3xx10^(-6) C are separated by a distance x = 10 cm. Find the magnitude and nature of the force between the two charges.

Two charges +2xx10^(-9) C and -8xx10^(-9) C are placed 0.3 M apart in air. Find the point or p[oints where the electric field and potential is zero.

Three charges q_1 = 1 xx 10^(-6) C, q^2 = 2 xx 10^(-6)C, and q_3 = -3 xx 10^(-6) C have been placed as shown in figure. Then the net electric flux will be maximum for the surface