Question

The area of Cross-section of a conducting wire is 2.25cm2.its length is 0.72cm.if the specific resistance of the wire is 163.75 ohm cm,then what would be its resistance in ohm?​

Answer 1

Area of crosssection = 2.25 cm^2

= 0.000225 m^2

length = 0.72cm

=0.0072 m

specific resistance = 163.75 ohm cm

= 1.6375 ohm m

$r \: = delta \times \frac{l}{a}$

$r \: = \: 1.6375 \times \frac{0.0072}{0.000225}$

r = 52.4 ohm

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