Asked by shrish
a wire has r of 16ohm it is drawn in a wire of half its lenght calculate the r of new wire
Answers
Answered by
drwls
If the length L is cut in half, the cross sectional area A must double.
Since the resistance is proportional to L/A, it must decrease by a factor of 4. That makes r = 4 ohms.
Since the resistance is proportional to L/A, it must decrease by a factor of 4. That makes r = 4 ohms.
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