1.

If the radius of cross section area increase twice by keeping length and nature material same. What change will come in its registance?

Answer»

Answer:

As we KNOW resistance is

1. Directly proportional to the length of the conductor

2. inversly proportional to the area of CROSS sectiona

so R = ¶ L / a

if are of cross section is DOUBLED the resistance will be decreased to half.

thank you



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