the resistance of a 1m long nichrome wire is 6 ohms .if we reduce the length of the wire to 70 cm .what will its resistance be ?.(ANSWER: 4.2 ohms).Plzz tell me solution of this word problem? plzz tell me in detail (NO shortcuts plzz)
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R1=pl/a where l is length and a is diameter
6=p/a when l=1m
if new length is 70cm=0.70m
hence R2=0.70p/a
now get R/1/R2= p/a÷ 0.70p/a
R1/R2= 1/0.70
now R1=6ohm
so R2= 6×0.70=4.2 ohm
6=p/a when l=1m
if new length is 70cm=0.70m
hence R2=0.70p/a
now get R/1/R2= p/a÷ 0.70p/a
R1/R2= 1/0.70
now R1=6ohm
so R2= 6×0.70=4.2 ohm
yogii81:
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yogii81
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