Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • A wire carries a current of 2.0 A. What is the charge that has flowed through its cross– section in 1.0 s. How many electrons does this correspond to?Optio

A wire carries a current of 2.0 A. What is the charge that has flowed through its cross– section in 1.0 s. How many electrons does this correspond to?

Option: 1

3.0\; C, 1.25\times 10^{19}


Option: 2

2.0\; C, 1.25\times 10^{19}


Option: 3

4.0\; C, 1.25\times 10^{19}


Option: 4

2.0\; C, 5.25\times 10^{19}


Answers (1)

best_answer

\begin{array}{ll} i=\frac{q}{t} & \\ \therefore & q=i t=(2.0 \mathrm{a})(1.0 \mathrm{~s})=2.0 \mathrm{C} \\ & \mathrm{q}=\mathrm{ne} \\ \therefore & \mathrm{n}=\frac{\mathrm{q}}{\mathrm{e}}=\frac{2.0}{1.6 \times 10^{-19}}=1.25 \times 10^{19} \end{array}

Posted by

vinayak

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

JEE Main Maths 2025: Five tips to score high marks in ‘toughest’ subject; most important chapters
anam-khan

JEE Main 2025 exam city intimation slip for session 1 soon at jeemain.nta.nic.in
anam-khan

Focus on modern physics, formulas to solve tricky problems; 5 tips to tackle JEE Main physics 2025

Latest Question