Home
Class 12
PHYSICS
The resistance of a copper wire of lengt...

The resistance of a copper wire of length 5 m is `0.5 Omega.` If the diameter of the wire is `0.05 cm,` determine its specific resistance.

Text Solution

Verified by Experts

`rho = (RA)/(l )`
or ` R = (rho l )/(A)`
`A = pi r ^(2) = 3. 14 xx (2. 5 xx 10 ^(-4))^(2)`
` = 1. 96 25 xx 10 ^(-7) m ^(2)`
`rho = (0.5 xx 1. 9625 xx 10 ^(-7))/( 5)`
`rho = 1. 9625 xx 10 ^(-8) Omega -m`
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    OSWAAL PUBLICATION|Exercise TOPIC-2 ( KIRCHHOFF.S LAWS & APPLICATIONS (SHORT ANSWER-TYPE QUESTIONS-I)|2 Videos

  • CURRENT ELECTRICITY

    OSWAAL PUBLICATION|Exercise TOPIC-2 ( KIRCHHOFF.S LAWS & APPLICATIONS (SHORT ANSWER-TYPE QUESTIONS-II)|3 Videos

  • CURRENT ELECTRICITY

    OSWAAL PUBLICATION|Exercise TOPIC-1 ( ELECTRIC CURRENT, RESISTANCE & CALLS) (LONG ANSWER TYPE QUESTIONS)|5 Videos

  • COMMUNICATION SYSTEM

    OSWAAL PUBLICATION|Exercise TOPIC-3 INTERNET, MOBILE AND GPS (SHORT ANSWER TYPE QUESTIONS -I)|2 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    OSWAAL PUBLICATION|Exercise TOPIC-2 DE-BROGLIE RELATION (NUMERICAL PROBLEMS)|7 Videos

Similar Questions

Explore conceptually related problems

a] Define electric resistance of a conductor. b] List the factors on which resistance of a conductor depends. c] Resistance of a metal wire of length 1 m is 104Omega" at "20^(@)C . If the diameter of the wire is 0.15 mm, find the resistivity of the metal at this temperature.

The resistivity of manganese wire of length 1 m is 1.84xx10^-6Omegam" at "20^(@)C . If the diameter of the wire is 3xx10^-4m , what will be the resistance of the wire at that temperature?

The resistance per metre length of a wire is 10 Omega . If the resistivity of the material of the wire is 50 xx 10^(-8) ohm metre, find the area of cross- section of the wire.

The resistance of a wire of 0.01 cm radius is 10 Omega . If the resistivity of the material of the wire is 50 xx 10^(-8) ohm meter, find the length of the wire.

A cube of side 0.05 m of a material of conductor is drawn into a wire of thickness 0.20 mm . If the specific resistance of the wire is 10^(-6)Omegam then calculate the resistance of the wire.

Two copper wires, one of length 1 m and the other of length 9m have the same resistance. The diameter in the ratio