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संबंधित प्रश्न
Calculate the cost of operating a heater of 500 W for 20 hours at the rate of Rs 3.90 per unit.
An electric bulb is rated 250 W, 230 V. Calculate:
- the energy consumed in one hour
- the time in which the bulb will consume 1.0 kWh energy when connected to 230 V mains.
What is the current I in the given circuit (Fig. )?
Name the physical quantity which is measured in kW.
Which cable, one rated 15A and the other rated 5A will be thicker? Give a reason.
Establish the relation that heat produced in a metallic conductor due to the flow of current is V2t/R joules, where V is the potential difference across the ends of the conductor, R its resistance and t is the time in second for which current flows.
A consumer uses 4 lamps of 60 watt, 2 lamps of 40 watt, and 2 lamps of 100 watt. All these are used for 6 hour daily. Find the total bill for 30 days when the rate of energy is 75 paise per unit and the meter rent is Rs. 1.
What is the meaning of electric power of an electrical device? Write its SI unit.
