Home
Class 10
PHYSICS
Calculate the resistance of a metal wire...

Calculate the resistance of a metal wire of length 2 m and area of cross section `1·55 xx 10^(-6) m^(2)`, if the resistivity of the metal be `2·8 xx 10^(-8) Omega` m ?

Text Solution

Verified by Experts

`R=(rhol)/(A)`
`=(2.8xx10^(-8)xx2)/(1.55xx10^(-6))`
`=(2.8xx2xx10^(-8-(-6)))/(1.55)`
`=(2.8xx2)/(1.55)xx10^(-2)=0.036 Omega`
Promotional Banner

Topper's Solved these Questions

  • ELECTRICITY

    OSWAAL PUBLICATION|Exercise TOPIC-1 (Short Answer Type Questions -II)|18 Videos

  • ELECTRICITY

    OSWAAL PUBLICATION|Exercise TOPIC-1 (Long Answer Type Questions )|15 Videos

  • ELECTRICITY

    OSWAAL PUBLICATION|Exercise TOPIC-1 (Very Short Answer Type Questions )|16 Videos

  • LIGHT-REFLECTION AND REFRACTION

    OSWAAL PUBLICATION|Exercise NCERT CORNER (TEXTBOOK EXERCISES)|15 Videos

Similar Questions

Explore conceptually related problems

Calculate the resistance of a 1 Km long copper wire of area of cross section 2 xx 10^(-2) cm^(2) . The resistivity of copper is 1.623 xx 10^(-8) ohm-meter.

100 mg mass of nichrome metal is drawn into a wire of area of cross-section 0.05 mm. Calculate the resistance of this wire. Given density of nichrome 8.4 xx 10^3 "kgm"^(-3) and resistivity of the material as 1.2 xx 10^(-6) Omega m.

Calculate the increase in energy of a gold bar of length 0.15m, and area of cross section 15xx10^(-4)m^(2) when compressed with a load of 10 kg weight along its length. Given Y=71xx10^(9)Nm^(-) and g=9.8ms^(-2)

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.

A current of 5 A is passing through a metallic wire of cross- sectional area 4 xx 10^(-6) m^(2) . If the density of charge carries of the wire is 5 xx 10^(26) m^(-3) , the drift velocity of the electrons will be

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.