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Questions  

Following figure shows four situations in which positive and negative charges moves horizontally through a region and gives the rate at which each charge moves. Rank the situations according to the effective current through the region greatest first
 

 

a
i = ii = iii = iv
b
i > ii > iii > iv
c
iii>i>ii=iv
d
i = ii = iii < iv

detailed solution

Correct option is C

For figure (i) i1=7AFor figure (ii)i2=3+2=5AFor figure (iii)i3=5+4=9AFor figure (iv) i4=6−1=5A

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