A uniform wire of length l and radius r has a resistance of 100 . It is recast into a wire of radius . The resistance of new wire will be :
1600
400
200
100
As we learnt in
Resistance formula -
- wherein
resistivity of material
Number of free electrons per unit volume.
Option 1)
1600
This solution is correct
Option 2)
400
This solution is incorrect
Option 3)
200
This solution is incorrect
Option 4)
100
This solution is incorrect
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