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प्रश्न
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संबंधित प्रश्न
Define Electric power.
How many joules are there in one kilowatt-hour?
When a current of 4.0 A passes through a certain resistor for 10 minutes, 2.88 × 104 J of heat are produced. Calculate
the power of the resistor.
the voltage across the resistor.
1kWh = …….. J
An electric bulb marked 220 V, 100 W will get fused if it is made to consume 150 W or more. What voltage fluctuation will the bulb withstand?
Two resistors A and B of 4 Ω and 6 Ω respectively are connected in parallel. The combination is connected across a 6 volt battery of negligible resistance. Calculate the power supplied by the battery.
What is the function of the split rings in a d.c. motor?
How is the amount of heat produced calculated due to the passage of current in a metallic conductor? Derive an expression for it.
An electric iron is rated at 230 V, 750 W. What is its resistance? What maximum current can be passed through it?
The resistance of filament of an electric heater is 500 Ω It is operated at 200V for 1 hour daily. Calculate the current drawn by the heater and the energy consumed in kWh, by the heater in a month of 30 days.
