resistance of a metal wire of length 1m is 26 ohm at 20 degree Celsius if the diameter of the wire is 0.3 millimeter what will be the resistivity of the material at that temperature
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heya ☺☺☺☺
Length of the metal wire = l , 1 m
Diameter of the wire = d , 0.3 mm
: . radius r ,0.3/2 mm = 0.15 mm = 0.15 × 10 -^3m
Resistance of the metal R , = 26 R
Thus,
Resistivity = rho = RA /L
= R × πr^2 / L
26× 3.14 × (0.15×10-^3 )^2 / 1 ohm
= 1.84 × 10 - ^8 ohm
... The resistivity of the metal wire at 20 ° c is 1.84 × 10-^8 ohm ..
I hope it help's u...✌✌✌
Length of the metal wire = l , 1 m
Diameter of the wire = d , 0.3 mm
: . radius r ,0.3/2 mm = 0.15 mm = 0.15 × 10 -^3m
Resistance of the metal R , = 26 R
Thus,
Resistivity = rho = RA /L
= R × πr^2 / L
26× 3.14 × (0.15×10-^3 )^2 / 1 ohm
= 1.84 × 10 - ^8 ohm
... The resistivity of the metal wire at 20 ° c is 1.84 × 10-^8 ohm ..
I hope it help's u...✌✌✌
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