calculate the resistance of 1 km long copper wire of radius 1 mm. (resistivity of copper =1.72 x 10^-8)
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Answered by
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Hi friend,
#5.5 ohm
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Solution :- Lenght = 1km = 1000m
Radius = 1mm = 1*10^-3 m
So, Resistivity of copper = 1.72×10^-8
➡Formula :-
➡Resistence = (Resistivity of copper*Lenght) / Area
=> Resistivity of copper*Lenght/22/7 ^2
➡Therefore ,
Resistence = ➡[1.72*10^-8×1000]/[22/7*10^-3]^2
= 5.5ohm ( proved)...i hope it helps you
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#5.5 ohm
_____________________________
Solution :- Lenght = 1km = 1000m
Radius = 1mm = 1*10^-3 m
So, Resistivity of copper = 1.72×10^-8
➡Formula :-
➡Resistence = (Resistivity of copper*Lenght) / Area
=> Resistivity of copper*Lenght/22/7 ^2
➡Therefore ,
Resistence = ➡[1.72*10^-8×1000]/[22/7*10^-3]^2
= 5.5ohm ( proved)...i hope it helps you
_____________________________
Mark me as a brainliest ✌
Be brainly !
dharanidinagara:
tnx pa!!
Answered by
2
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GIVEN THAT
Length of copper wire = 1 km = 1000 m
Radius of copper wire = 1 mm = 1 × 10-³ m
Resistivity of copper = 1.72 x 10⁻⁸
CALCULATION OF RESISTANCE
(Resistivity of copper × Length)/(Area)
(Resistivity of copper × Length)/(πr²)
[1.72×10⁻⁸*1000]/[22/7×(1×10⁻³)²]
5.5 ohm
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