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# Five identical plates are connected across a battery as in figure. If the charge on plate 1 be +q, then the charges on the plates 2,3,4 and 5 are:−q,+q,−q,+q−q,+2q,−2q,+qnone of the above.−2q,+2q,−2q,+q

A
q,+q,q,+q
B
2q,+2q,2q,+q
C
q,+2q,2q,+q
D
none of the above.
Solution
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#### The plate 2 is the common plate between 1 and 3 and it is connected to negative end of battery. So its charge should be −(q+q)=−2q.Similarly plate 3 is in between 2 and 4 but it is connected to positive end of battery. So its charge =+2q and plate 4 is in between 3 and 5 and it is connected to negative end of battery. So its charge should be −(q+q)=−2q.Plate 5 is single plate and it is connected to positive end of battery. So its charge =+q

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