Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • The density and eq. wt of a metal are 10.5 g cm^{-3} and 100, respectively. The time required for a current of 3 amp to deposit a 0.005 mm t

The density of eq. wt of a metal are 10.5 g cm-3 and 100, respectively. The time required for a current of 3 amp to deposit a 0.005 mm thick layer of the same metal on an area of 80 cm2 is closest to:

Answers (1)

\\\text{The volume of deposited metal layer }=0.005 \times 0.1 \mathrm{cm} \times 80 \mathrm{cm}^{3}=0.04 \mathrm{cm}^{3}$ \\ the mass of the deposited metal $=0.04 \times 10.5=0.42 g$ \\ now, $W=\frac{E \times Q}{F}$ \\ $\Rightarrow \quad 0.42=\frac{100 \times 3 \times t}{96485}$ \\ $\Rightarrow \quad t=135 \mathrm{sec}$

Posted by

lovekush

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JAC Chandigarh Counselling 2025: Round 1 seat allotment result out for BTech admissions
anam-khan

JoSAA round 5 seat allotment result 2025 out on josaa.nic.in
anam-khan

BTech aspirant from north-east or UT? Apply for CSAB NEUT counselling 2025 today

Latest Question