Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • NCERT
  • The number density of free electrons in a copper conductor estimated in Example 3.1 is 8.5 × 10 28 m –3. How long does an electron take to drift from one end of a wire 3.0 m long to its other end? The area of cross-section of the wire is 2.0 × 10 –6 m 2

3.13 The number density of free electrons in a copper conductor estimated in Example 3.1 is 8.5\times 10^{28}m^{-3}. How long does an electron take to drift from one end of a wire 3.0 m long to its other end? The area of cross-section of the wire is 2.0\times 10^{-6} m^2and it is carrying a current of 3.0 A. 

Answers (1)

best_answer

We know,

I = neAv_d

V_d:Drift Velocity = Length of wire(l) / time taken to cover

I = neA \frac{l}{t} 

 by substituting the given values

\implies t = 2.7 x 10^4 s

Therefore, the time required by an electron to drift from one end of a wire to its other end is  2.7\times 10^4 s.

Posted by

HARSH KANKARIA

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

CBSE date sheet 2025 for Classes 10, 12 likely in November last week: Reports
anam-khan

CBSE allows Class 10, 12 students from disaffiliated schools to appear for board exam 2025 from same school
anam-khan

CBSE withdraws affiliation of 21 schools, downgrades 6 schools in two states; most in Delhi

Latest Question