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marusya05 [52]
2 years ago
12

A wire of length 40 cm and area of cross -section 0.1 mm² has a resistance of 0.8Ω. Calculate specific resistance of the wire.​

Physics
1 answer:
alina1380 [7]2 years ago
7 0

l = 40cm  \\    \bold \red{area \: of \: cross \: section} \: a = 0.1mm {}^{2}   \\  =  \frac{0.1}{100} cm {}^{2}  \\  \\  \R = 0.8  Ω \\  \\ \bold \green{ Specific \:  Resistance \:  of \:  wire \:ρ } =  \frac{Ra}{l}  \\  =  \frac{0.8}{40}  \times  \frac{1}{100}  \\ \\   ρ = 0.00002Ω - cm

Hope This Helps!!

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