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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > Four charges are placed at four corners of a square as shown in figure. The side of the square is a. Two charges are positive and two are negative, but their magnitudes are the same. Now, an external agent starts decreasing all the sides of the square slowly and at the same rate. What happens to the electrical potential energy of the system and what will be the nature of work done by the agent?

Four charges are placed at four corners of a square as shown in figure. The side of the square is a. Two charges are positive and two are negative, but their magnitudes are the same. Now, an external agent starts decreasing all the sides of the square slowly and at the same rate. What happens to the electrical potential energy of the system and what will be the nature of work done by the agent?

A solid conducting sphere of radius 10cm is enclosed by a thin metallic shell of radius 20cm. A charge q=20μC is given to the inner sphere is connected to the shell by a conducting wire. but their magnitudes are the same. Now Four charges are placed at four corners of a square as shown in figure. The side of the square is a. Two charges are positive and two are negative