Physics, asked by tanishq7363, 1 year ago

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)

Answers

Answered by yogii81

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

yogii81: mark me as brainlist plzz

tanishq7363: what is actual difference between force and momentum plzz telll me the answer with detail explanation

tanishq7363: yogii81

yogii81: momentum is multiplication of mass n velocity(mv) .......n rate of change in momentum is called force....if initial velocity=u of an object having mass m n final velocity v.....then initial momentum = mu n final momentum= mv.......,now rate of change in momentum= (mv-mu)/t= m(v-u)/t= m×a=F

tanishq7363: thnx

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