Three heater coils H1, H2 and H3 rated (1000 W :100V), (1500 W : 100 V) and (2000 W : 100 V) individually take a time interval of 12 minutes, 6 minutes and 4 minutes respectively to generate the same quantity of heat Q when connected to a 100 V source. Now these three coils are connected in parallel and this parallel combination is connected to a 50 V source. The time interval taken by this parallel combination of coils to generate the same quantity of heat Q is\t2 minutes\t6 minutes\t8 minutes\t12 minutes
Abhishek Dogra , 5 Years ago
Grade 12
1 Answers
Vikas TU
Last Activity: 5 Years ago
Dear student
H = I2RT or H = P*t
H1 = 1000* 12/60 = 200 joules
H2 = 1500 * 6/60 = 150 joules
H3 = 2000 * 4/60 = 400/3 joules
Heat generated will be different for each coil ,
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