Current Electricity Charging Discharging Of Capacitors Question 70
Question: When a copper voltameter is connected with a battery of e.m.f. 12 volts. 2 gms of copper is deposited in 30 minutes. If the same voltameter is connected across a 6 volt battery, then the mass of copper deposited in 45 minutes would be
[SCRA 1994]
Options:
A) 1 gm
B) 1.5 gm
C) 2 gm
D) 2.5 gm
Show Answer
Answer:
Correct Answer: B
Solution:
$ m=Zi,t $
Therefore $ m=\frac{ZVt}{R} $
Therefore $ m\propto Vt $
Therefore $ \frac{m _{1}}{m _{2}}=\frac{V _{1}t _{1}}{V _{2}t _{2}} $
Therefore $ \frac{2}{m _{2}}=\frac{12\times 30}{6\times 45} $
Therefore $ m _{2}=1.5,gm $
BETA
