Current Electricity Charging Discharging Of Capacitors Question 74
Question: The electrochemical equivalent of a metal is $ 3.3\times {{10}^{-7}},kg/coulomb $ . The mass of the metal liberated at the cathode when a 3 A current is passed for 2 seconds will be
[SCRA 1998; AIEEE 2004; DCE 2005]
Options:
A) $ 19.8\times {{10}^{-7}}kg $
B) $ 9.39\times {{10}^{-7}}kg $
C) $ 6.6\times {{10}^{-7}}kg $
D) $ 1.1\times {{10}^{-7}}kg $
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Answer:
Correct Answer: A
Solution:
$ m=Zi,t=3.3\times {{10}^{-7}}\times 3\times 2=19.8\times {{10}^{-7}}kg $
BETA
