Current Electricity Charging Discharging Of Capacitors Question 50
Question: The current flowing in a copper voltameter is 1.6 A. The number of $ C{{u}^{++}} $ ions deposited at the cathode per minute are
[MP PMT 1994; MP PET 2000]
Options:
A) $ 1.5\times 10^{20} $
B) $ 3\times 10^{20} $
C) $ 6\times 10^{20} $
D) $ 1\times 10^{19} $
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Answer:
Correct Answer: B
Solution:
Charge Q = I t = 1.6 ´ 60 = 96 C Let n be the number of $ C{{u}^{+2}} $ ions, then $ ne=Q $
Therefore $ n=\frac{Q}{e}=\frac{96}{2\times 1.6\times {{10}^{-19}}}=3\times 10^{20} $
BETA
