the resistance of 1.0 metre long wire and of radius 0.2 mm is 4.0 ohm find out the resistivity of material of wire
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Resistance=2 ohm
Length=1m
Diameter=4 mm =4/1000=0.004m
Radius=diameter/2=0.004/2=0.002m
Resistance = resistivity×length/area
2=resistivity×1/0.002
2×2/1000=resistivity
4/1000=resistivity
0.004= resistivity
Length=1m
Diameter=4 mm =4/1000=0.004m
Radius=diameter/2=0.004/2=0.002m
Resistance = resistivity×length/area
2=resistivity×1/0.002
2×2/1000=resistivity
4/1000=resistivity
0.004= resistivity
laba46:
Brother, Here R=4 Ohm.
It's wrong. Just check again.
ok
Have a look on my answer.
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1
It's resistivity is 5024×10^-10 ohm.m.
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