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प्रश्न
What is meant by " electric power"
उत्तर
Electrical power is the electric work done per unit time.
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संबंधित प्रश्न
State two factors on which the electrical energy consumed by an electrical appliance depends.
Which one has a higher electrical resistance : a 100 watt bulb or a 60 watt bulb?
A bulb is rated as 250 V; 0.4 A. Find its : (i) power, and (ii) resistance.
An electric iron is rated at 750 W, 230 V. Calculate the electrical energy consumed by the iron in 16 hours .
An electric heater is rated 220 V, 550 W. Electrical energy is also measured in kWh. What do you understand by a kilo-watt-hour?
Three 250 W heaters are connected in parallel to a 100 V supply, Calculate total current taken from the supply.
A bulb is connected to a battery of e.m.f. 6V and internal resistance 2Ω A steady current of 0.5A flows through the bulb. Calculate the resistance of the bulb.
A battery of e.m.f. 12V and internal resistance 1.6 Ω is connected to two resistors of 4Ω and 6Ω connected in parallel. Calculate:
(i) the current drawn from the battery,
(ii) the power dissipated in each resistor,
(ii)the total power supplied by the battery.
An electric appliance is rated at 1000 W, 250V. Calculate:
(i) The electrical energy consumed by the appliance in 12 hour.
(ii) The cost of energy consumed at Rs. 1.20 per kWh.
How long would this appliance take to use 1 kWh energy when operated at 250 V?
