A wire has a diameter d and resistance R. If the diameter is made 3d, – McqOptions

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1.	A wire has a diameter d and resistance R. If the diameter is made 3d, the length and material remaining the same, the new value of resistance will be
A.	R/3
B.	3 R
C.	R/9
D.	9 R
Answer» D. 9 R

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