Home
Class 8
PHYSICS
A copper wire of mass 20 g carries a cur...

A copper wire of mass 20 g carries a current of 6.023 A. What fraction of the total number of free electrons present in copper wire flows through the cross-section of the copper wire in 2 s ?
(gram atomic weight of copper = 63.5 g)

Text Solution

Verified by Experts

(i) Number of atoms (n) = mass of the substance `xx` number of atoms in one gram.
Number of electrons = n `xx` no. of electrons in each atom
`i=(Q)/(t)`
`q=n bar(e)`
(ii) ` (127)/(64xx10^(4))`
Promotional Banner

Topper's Solved these Questions

  • ELECTRICITY

    PEARSON IIT JEE FOUNDATION|Exercise TEST YOUR CONCEPTS (Very Short Answer Type Questions)|28 Videos

  • ELECTRICITY

    PEARSON IIT JEE FOUNDATION|Exercise TEST YOUR CONCEPTS (Short Answer Type Questions)|11 Videos

  • ELECTRICITY

    PEARSON IIT JEE FOUNDATION|Exercise Level - 2|20 Videos

  • DYNAMICS

    PEARSON IIT JEE FOUNDATION|Exercise CONCEPT APPLICATION(LEVEL 3)|15 Videos

  • ELECTROMAGNETISM

    PEARSON IIT JEE FOUNDATION|Exercise CONCEPT APPLICATION ( LEVEL 2)|20 Videos

Similar Questions

Explore conceptually related problems

The number of electrode passing per second through a cross-section of copper wire carrying 10^(-6) ampere:

How many electrons per sec pass through a cross-section of a copper wire carrying 10^(-15) ampere?

How many electrons per second pass through a cross-section of copper wire carrying 10^(-16) A current ?

A small insect crawls in the direction of electron drift along bare copper wire that carries a current of 2.56A. It travels with the drift speed of the electron in the wire of uniform cross-section area 1mm^2 Number of free electrons for copper = 8 times 10^28// cc and resistivity of copper = 1.6 times 10^-8 Omega m How much time would the insect take to crawl 1.0 cm if it crawls at the drift speed of the electron in the wire?