A wire resistance 9 ohm having length 30cm is tripled on itself .what is the new resistance????************
plz answer to this question
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A wire resistance 9 ohm having length 30cm is tripled on itself .what is the new resistance????************
plz answer to this question
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Explanation:
given
resistance (R)=9ohms
length=30×10^-2m=0.3m
R=0.3p/A=9
If wire is tripled
length=(3×0.3)m
new area=A/√3
new resistance=p (3×0.3)/(A/√3)
=3√3 (0.3p/A)
= 27√3ohms