Question

Resistance of a metal wire of length 2 metre is 40 ohm if the diameter of the virus 0.3 mm what will be the resistivity of the metal at that temperature 0

Answer 1

Given - Resistance - 40 ohm

Diameter of wire - 0.3mm - 0.0003m

Length - 2 m

Find - Resistivity

Solution - Resistivity of a wire can be calculated by the help of formula -

Rho = R*A/L

In the equation, rho represents Resistivity, R is for resistance, A is for area and L is for length.

Keeping the values in equation-

Rho = 40*0.0003/2

Rho = 0.012/2

Rho = 0.06 ohm meter.

Hence, resistivity of wire will be 0.06 ohm meter

Answer 2

Answer:

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