Advertisements
Advertisements
प्रश्न
1 calorie = _________ joule.
Advertisements
उत्तर
1 calorie = 4.18 joule
APPEARS IN
संबंधित प्रश्न
1 kWh = ________ J
What is consumed using different electrical appliances, for which electricity bills are paid?
Define watt. Write down an equation linking watts, volts and amperes.
An electric fan runs from the 230 V mains. The current flowing through it is 0.4 A. At what rate is electrical energy transferred by the fan?
Why is an electric light bulb not filled with air? Explain why argon or nitrogen is filled in an electric bulb.
Write an expression for the electrical power spent in flow of current through a conductor in terms of
(a) Resistance and potential difference, (b) current and resistance.
An electric bulb of resistance 500 Ω draws current 0.4 A from the source. Calculate:
- the power of bulb and
- the potential difference at its end.
Which cable, one rated 15A and the other rated 5A will be thicker? Give a reason.
Why is heating coil wound in the form of a helix in electric stove?
Why is heating element wound on a long porcelain rod in a room heater.
What changes in energy occur in an electric bulb?
How does the heat produced by die passage of current in a metallic wire depend on the resistance of the wire.
What do you understand by ‘earthing’? What are the advantages of earthing in a household electric circuit? Explain, how it is done?
At what voltage is the electric power generated at the generating station? Explain the transmission of this power to your house.
A 100-watt electric bulb is used for 5 hours daily and four 60 watt bulbs are used for 5 hours daily. Calculate the energy consumed (in kWh) in the month of January.
The unit of e.m.f. of a cell is ____________.
A cooler of 1500 W, 200 volts and a fan of 500 W, 200 volts are to be used from a household supply. The rating of fuse to be used is:
A conductor of 10 Ω is connected across a 6 V ideal source. The power supplied by the source to the conductor is ______.
