Current Electricity Charging Discharging Of Capacitors Question 80
Question: The current flowing in a copper voltameter is 3.2 A. The number of copper ions $ (C{{u}^{2+}}) $ deposited at the cathode per minute is
[Pb. PET 2001]
Options:
A) $ 0.5\times 10^{20} $
B) $ 1.5\times 10^{20} $
C) $ 3\times 10^{20} $
D) $ 6\times 10^{20} $
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Answer:
Correct Answer: D
Solution:
Charge supplied per minute = 3.2 ´ 60 = 192 C Charge 2e liberates one Cu+2 ion \No of Cu+2 ion liberate by 192 C $ =\frac{192}{2e}=\frac{192}{2\times 1.6\times {{10}^{-19}}}=6\times 10^{20} $
BETA
