Current Electricity Charging Discharging Of Capacitors Question 653
Question: The n rows each containing m cells in series are joined in parallel. Maximum current is taken from this combination across an external resistance of 3W resistance. If the total number of cells used are 24 and internal resistance of each cell is 0.5 W then
[J & K CET 2005]
Options:
A) $ m=8,n=3 $
B) $ m=6,n=4 $
C) $ m=12,n=2 $
D) $ m=2,n=12 $
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Answer:
Correct Answer: C
Solution:
Total cells = m ´ n = 24 …. (i) For maximum current in the circuit $ R=\frac{mr}{n} $
Therefore $ 3=\frac{m}{n}\times (0.5) $
Therefore m = 6n ….. (ii) On solving equation (i) and (ii), we get m = 12, n =2
BETA
