MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
Grade: upto college level
        A current of 1.0 A exists in a copper wire of cross-section 1.0 mm^2. Assuming one free electron per atom calculate the drift speed of the free electrons in the wire. The density of copper is 9000 kg/m^3.
5 years ago

Answers : (2)

Jitender Pal
askIITians Faculty
365 Points
							Sol. i = 1 A, A = 1 mm2 = 1 * 10^–6 m^2
F’ cu = 9000 kg/m^3
Molecular mass has N base 0 atoms
= m Kg has (N base 0/M * m) atoms = N base 0AI9000/36.5 * 10^-3
No.of atoms = No.of electrons
n = No.of electrons/Unit volume = N base 0Af/mAI = N base 0f/M
= 6 * 10^23 * 9000/63.5 * 10^-3
i = V base d n A e.
⇒ V base d = i/nAe = 1/6 * 10^23 *9000/63.3 * 10^-3 *10^-6 *1.6 * 10^-19
= 63.5 * 10^-3/6 * 10^23 *9000 * 10^-6 * 1.6 * 10^-19 = 63.5 * 10^-3/6 * 9 * 1.6 * 10^26 *10^-19 * 10^-6
= 63.5 * 10^10-3/6 * 9 * 1.6 * 10 = 63.5 * 10^-3/6 * 9 *16

						
5 years ago
Ashok kumar sharma
28 Points
							
  1. Density of Cu=9×103kg/m3 (mass of 1 m3 of Cu) 6.0×1023 atoms has a mass = 63×103kg \ Number of electrons per m3are               =6.0×102363×10-3×9×103=8.5×10​28​​Density of Cu=9×103kg/m3 (mass of 1 m3 of Cu) 6.0×1023 atoms has a mass = 63×103kg \ Number of electrons per m3are =6.0×102363×10−3×9×103=8.5×1028 Now drift velocity =vd=ineA =1.18.5×1028×1.6×10−19×π×(0.5×10−3)2 =0.1×10−3m/sec  Now drift velocity =vd=ineA =1.18.5×1028×1.6×10−19×π×(0.5×10−3)2 =0.1×10−3m/sec
one year ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies


Course Features

  • 731 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution


Course Features

  • 57 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details