Question

when a copper votameter is connected with a battery of emf `12V,2g` of copper is deposite in `30` min. if the same voltmeter is connected across a `6V` battery then the mass of copper deposite in `45` min would be
A. 1g
B. 1.5g
C. 2g
D. 2.5g

Answer 1

Correct Answer - B
`m = Z it = Z V/R t`
`(m_1)/(m_2) = (i_1t_1)/(V_2t_2) implies 2/(m_2) = (12xx30)/(6xx45)`
`m_(2) = 1.5 g`