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संबंधित प्रश्न
Which uses more energy, a 250 W TV set in 1 hr, or a 1200 W toaster in 10 minutes?
At what frequency is AC supplied to residential houses?
Name the quantity whose unit is (i) kilowatt, and (ii) kilowatt-hour.
Calculate the cost of operating a heater of 500 W for 20 hours at the rate of Rs 3.90 per unit.
How many joules of electrical energy are transferred per second by a 6 V; 0.5 A lamp?
(a) 30 J/s
(b) 12 J/s
(c) 0.83 J/s
(d) 3 J/s
Two electric lamps each rating 100 W, 110 V are connected in series to a 220 V power supply and two other electric lamps each of marking 100 W, 220 V are connected in parallel to the same power supply. Will anyone of the two combinations give more light than the other? Give a reason for your answer.
Electric power is inversely proportional to ____________.
The electrical power and current in the circuit relates by ______
