Question

The resistance of a wire of length 250 m is 1 ohm. If the resistivity of the material of wire is 1.6 x 10-8 ohm metre, find the area of cross section of the wire. How much does the resistance change if the diameter is doubled? ​

Answer 1

Answer:

if diameter is doubled then area will become 4A. = 1/4 ohm.

Step-by-step explanation:

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