Q. 103.5( 18 Votes )

The resistance of

Answer :

Length of the metal wire, l = 1 m

The diameter of the wire, d = 0.3 mm

Radius, r = 0.3/2 mm = 0.15 mm = 0.15 x 10-3 m

The resistance of the metal, R = 26 Ω

Formula used:

1. Resistivity (ρ) =

R is the resistance of the resistor
A is the area of the cross-section of the wire
L is the length of the wire

Putting the values of formula 2 in formula 1, we get

⇒ ρ = 1.84 × 10-6 Ωm

Thus, the resistivity of the metal wire is 1.84 × 10-6 Ωm

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