Q. A silver and a zinc voltmeter are connected in series and a current $I$ is passed through them for a time $t$, liberating $w$ gram of zinc. The weight of silver deposited is nearly
A) 1.7 $w$ g
B) 2.4 $w$ g
C) 3.5 $w$ g
D) 1.2 $w$ g
Explanation
(c) $m_{Ag}/m_{Zn}$ = $E_{Ag}$/$E_{Zn}$ = 108/31
${or\ m}_{Ag} =$ $m_{Zn} \times 108/31$= $w \times 108/31$
3.48 w = 3.5 w
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.