How much will be heat devoloped if 0.2A current flows through a conductor of resistance 200 ohm for 5minutes?
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Explanation:
Heat dissipated in a resistance is given by H=i
2
×r×t
For option A H=5
2
×10×2×60=30000W
For option B H=4
2
×10×3×60=28800W
For option C H=3
2
×10×6×60=32400W
For option D H=2
2
×10×5×60=12000W
from calculation we can see the heat Which is maximum in case of 3 ampere current for 6 minutes.
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