Questions
Three large plates are arranged as shown. How much charge will flow through the key k if it is closed?
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Correct option is A
Before closing the switch After closing the switchq1+q2=2QVAB=VAC or q1C1=q2C2 q1q2=C1C2=2 or q1=2q2Solving, we get q1=4Q3, q2=2Q3Charge flown through K is−Q2−(−q1)=−Q2+4Q3=5Q/6
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Three identical metallic plates are kept parallel to one another at separations a and b. The outer plates are connected to the ground and the middle plate is given charge Q (figure). Then, the charge on the right side of middle plate is
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