Question

what will be the resitance of. metal wire of length 2 meter and area of Cross section 1.55 ​

Answer 1

Answer:

The resistance of the metal wire is

3.61 x 10-²

Explanation:

Given:

Length of metal wire = 2m

Area of cross section = 1.55 x 10-6m²

Resistivity of metal = 2.8 x 10 8 ohm m

We have to find the resistance of metal wire.

L = 2m

A = 1.55 * 10 ^ - 6 * m ^ 2

p= RA L

Therefore,

pL R = L

Now, let us substitute all the known values in the above expression.

We get,

R = (2.8 * 10 ^ - 8 * 2)/(1.55 * 10 ^ - 6)

By simplification we get the above expression as,

R = (2.8 * 10 ^ - 8 * 2)/(1.55 * 10 ^ - 6)

By simplification we get the above expression as,

R = 560/(1.55 * 10 ^ - 2) R = 3.61 * 10 ^ - 2

Hence resistance of the metal wire= 3.61 x 10-2

Explanation:

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