Two cylindrical silver wires A and B have the same length . Diameter of A is double the diameter of B. The resistance of a wire is :
a)wire A is double of wire B
b)wire B is double of wire A
c)both wires are same
d)wire B is four times that of A
Answers
Answered by
1
ANSWER =B ✌✌✌✌✌.........
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xoSHOAIBxo:
wrong answer because both the wires have same length
Answered by
1
R=gl/A
l=lenght
a=area
r=resistivity
Da=2Db
or
Ra=2Rb
resistance of b=gl/Ab
=gl/πRb²
Resistance of a=gl/Aa
=gl/πRa²
=gl/π*4Rb²
=resistance of b/4
therefore correct option is d
can you solve it in your notebook please I insist you
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