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current of 12 amp is flowing through a resistance of 20 ohm for 5 min, calculate this amount of heat generated in calories (1 calories =4.2 joules) |
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Answer» 205.71 k calExplanation:GIVEN : CURRENT i = 12 AResistance R = 20 ΩTime t = 5 min = 5 × 60 sec = 300 secWe're ASKED to find Heat : We know : H = i² R tPutting values here we get : H = 12² × 20 × 300 JH = 144 × 6 × 10³ JH = 864 k JIn term of cal : H = 864 / 4.2 k cal :H = 205.71 k calHence we get required answer! |
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