Q. In a copper voltmeter experiment, current is decreased to one-fourth of the initial value but is passed for four times the earlier duration. Amount of copper deposited will be
A) Same
B) One-fourth the previous value
C) Four times the previous value
D) $\frac{1}{16}th$ the previous value
Explanation
(a) In the first case, $Zit = m$
In the second case, $Z \times \frac{i}{4} \times 4t = m$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.