Question

the resistance of a wire of length 300 m and cross _section area 1.0mm^2 made of material of resistivity 1.0×10^-7

Answer 1

hello friend...!!!

• According to the question, we should calculate the resistance of the material,

• Resistance R = ΦL / A

here, Φ represents resistivity, L represents length and A represents Area

• given : L = 300 m

A = 1 mm^2 = 1 X 10^-6 m

Φ = 1 X 10^-7
therefore, Resistance is

R = ( 1 X 10^-7 X 300 ) / 1 X 10^-6

R = 300 X 10^-7 X 10^6

R = 300 X 10^-1

therefore,

R = 30 ohm.

the resistance of the given material is 30 ohm.

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hope it helps...!!!

Answer 2

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