No products in the cart.

  1. Homework Help
  2. CBSE
  3. Class 12
  4. Physics

A potential difference V is applied …

CBSE, JEE, NEET, CUET

CBSE, JEE, NEET, CUET

Question Bank, Mock Tests, Exam Papers

NCERT Solutions, Sample Papers, Notes, Videos

Install Now
A potential difference V is applied across the ends of copper wire of length l and diameter d.What is effect on drift velocity if 1)V is halved 2)I is doubled

    • Posted by Sai Mohan 5 years, 3 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Mishti ???? 5 years, 3 months ago

    Solution~~ Drift velocity = v_drift = I / (neA) = J/(ne)  =  V/(neA R) = V/(neρl)      I = current     n = num of electrons per unit volume (constant for copper      e = electron charge      A = area of cross section = π D²/4       R = resistance of wire      ρ = resistivity         l = length of wire Thus,  i)  When V is doubled, drift velocity is doubled. 2) l is doubled then velocity is halved , if V remain same. Regards. ??

    2Thank You

    ANSWER
    http://mycbseguide.com/examin8/

    Related Questions

    Q.3A Free Proton and a Free Electron are Placed in a Uniform Field. Which of the Two Experiences Greater Force and Greater Acceleration?

    • Posted by Ayush Rajput 1 year, 3 months ago

    CBSE > Class 12 > Physics
    • 1 answers
    Lota graph showing the variation of current with voltage for the materials gaas on the graph mark the reason where a resistance is negative and Om is obey

    • Posted by Siwani Gupta 1 year, 2 months ago

    CBSE > Class 12 > Physics
    • 0 answers
    two pith -balls each weighing 10-³ kg are suspended from the same point by means of silk threads -0.5 m long .on charging the balls equally, they are found to repel each other to a distance of 0.2 m .calculate the charge on each ball .

    • Posted by Preeti Sahu 7 months, 2 weeks ago

    CBSE > Class 12 > Physics
    • 0 answers
    A Carbon resistor has three strips of red colour and a gold strip. What is the value of resistor? What is its tolerance?

    • Posted by Kaviyarasan 2007 1 year, 2 months ago

    CBSE > Class 12 > Physics
    • 0 answers
    A mirror is turned through 17 degree then the reflected ray is turned by

    • Posted by Khushbu Otti 1 year, 2 months ago

    CBSE > Class 12 > Physics
    • 0 answers
    Derivation of ohm's law class 12

    • Posted by Aniket Mahajan 7 months, 2 weeks ago

    CBSE > Class 12 > Physics
    • 0 answers
    A pith ball may become charge d by gaining or losing

    • Posted by Anterpreet Kaur 1 year, 3 months ago

    CBSE > Class 12 > Physics
    • 0 answers
    Three charges q,-4q,2q are placed at vertex of equilateral triangle find amount of work done to make its set up

    • Posted by Manshi Roll No-36,Class Xi-A 1 year ago

    CBSE > Class 12 > Physics
    • 0 answers
    what us current

    • Posted by Shristi Maurya 8 months ago

    CBSE > Class 12 > Physics
    • 2 answers
    Two metallic sphere of radii 1 cm and 3 cm are given charge of minus 1 into 10 ke power 2 coulomb and 5 x 10 power 2 respectively if these are connected by conducting wire the final charge on the bigger sphere is

    • Posted by Khushi Aw 1 year, 3 months ago

    CBSE > Class 12 > Physics
    • 0 answers

    myCBSEguide App

    myCBSEguide

    Trusted by 1 Crore+ Students

    Install Now

    Test Generator

    Test Generator

    Create papers online. It's FREE.

    Try Now

    CUET Mock Tests

    CUET Mock Tests

    75,000+ questions to practice only on myCBSEguide app

    Install Now
    Google Play

    Download myCBSEguide App

    All Courses

    Other Websites

    CBSE Courses

    Resources

    Corporate

    NCERT Solutions

    CBSE Sample Papers

    All Content and Intellectual Property is under Copyright Protection | myCBSEguide.com ©2007-2025