Two wires a and b of equal length and circular cross section are made of the same metal, but the resistance of wire b is four times that of wire a. what is the ratio between their spokes ? : a) rb / ra = 2, b) ra / rb = 2, c) rb / ra = 4, d) ra / rb = 16

   Option B is the correct answer.

Explanation:

We have resistance

The resistance of wire B is four times that of wire A

    Option B is the correct answer.          

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it is a negative acceleration