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प्रश्न
State the S.I. unit of electrical power.
उत्तर
The S.I. unit of electrical power is Watt.
संबंधित प्रश्न
Distinguish between kilowatt and kilowatt-hour.
State three factors on which the heat produced in a metallic wire due to passage of current in it depends.
Mention three uses of the carbon arc.
An electric bulb is marked 100 W, 230 V. What does this mean?
What do you understand by ‘earthing’? What are the advantages of earthing in a household electric circuit? Explain, how it is done?
How does earthing prevent electrical shock?
With reference to the diagram shown below calculate:
(i) The equivalent resistance between P and Q.
(ii) The reading of ammeter.
(iii) The electrical power between P and Q.
An Electric bulb is marked 100 W, 230 V. What find the energy consumed by the bulb in one hour.
A house is provided with 15 bulbs of 40W, 5 bulbs of 100W, 5 fans of 80 W, and one heater of 1.0 kW. Each day bulbs are used for 4h, fans for lOh, and heater for 2h. The voltage of mains is 220 V. Calculate:
(i) Maximum power of the circuit in the house,
(ii) maximum current capacity of the main fuse in the house,
(iii) the electrical energy consumed in a week,
(iv) cost of electricity consumed at 1.25 Rs. per kWh.
What is the commercial unit of electrical energy? Represent it in terms of joules.
