Two copper conductors have equal length The cross-sectional area of one...

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Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be

A. 160 ohms

B. 80 ohms

C. 20 ohms

D. 10 ohms

Answer: Option D

Awais Ahmed:

2 years ago

If Area A1 is =4a1 and Area A2 is =a2/4. Then Rt=40/4=10 ohms
Navneet Kumar:

5 years ago

R= rhol/A
then 40/4 = 10 ohms

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