the resistance of wire of 5 cm radius is 20 ohm if the resistivity of the material of the wire is 50*10^-8ohm find the length of the wire
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as we know that R=rho*l/a
=>l= R*a/rho
a= pi*.05*.05
by putting all the values we have length
.00314*10^-8
=>l= R*a/rho
a= pi*.05*.05
by putting all the values we have length
.00314*10^-8
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