1 kg piece of copper is drawn into a wire of 1 mm thick and another piece into wire of 2 mm thick. Compare the resistance of these wires.
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as the material of the wire is same so
as per the formula
R = ¶ L /A
Resistance is inversely proportional to area
let R1 is resistance of 1 mm wire
R2 is resistance of 2 mm wire
R1/R2 = L1A2/L2A1
= L1πr2L2/ L2πr1L1
= r2/r1
= 1/1/2
= 2/1
R1:R2 = 2:1
as per the formula
R = ¶ L /A
Resistance is inversely proportional to area
let R1 is resistance of 1 mm wire
R2 is resistance of 2 mm wire
R1/R2 = L1A2/L2A1
= L1πr2L2/ L2πr1L1
= r2/r1
= 1/1/2
= 2/1
R1:R2 = 2:1
nikhilraj2:
is that a right answer..?
yeah because diameter of wire is givel so radius will half
if the length is same then it will be answer
length will be not same
okay then resistance will depends on both length and Area of tha wire
because the mass of the material is same and if we draw the copper into wire of diameter 1mm and 2 mm separately.. then the length of both the wires will not be same..
2 mm wire will be thick than 1 mm wire and shorter than 1 mm wire
okay see again my answer i edit the answer
ok
if it helps then mark as brainliest
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