Question

The electrical resistivity of silver is 1.6×10-8 Ωm what will be resistance of a silver wire of length 1 cm.

and cross sectional area 2×10-3m

2

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Answer 1

Answer:

8 × 10^-8 ohm

Explanation:

According to the given question,

p = resistivity = 1.6×10^-8 ohm.m

l = length = 1 cm = 10^-2 m

A = Area of cross section = 2×10^-3 m^2

R = Resistance

And we are asked to find the resistance.

We know,

• R = pl/A

Putting the values we get,

• R = (1.6×10^-8 ×10^-2)/2×10^-3

• R = 1.6 × 10^-10/2×10^-3

• R = 16 × 10^-11/2×10^-3

• R = 8 × 10^-8 ohm

Thus resistance of the silver wire is 8×10^-8 ohm.