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प्रश्न
Why is heating coil wound in the form of a helix in electric stove?
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उत्तर
This reduces the area over which element of heater is spread. As heat is produced over smaller area, therefore temperature of its element rises to about 1000°C.
संबंधित प्रश्न
Two lamps, one rated 100 W at 220 V, and the other 60 W at 220 V, are connected in parallel to electric mains supply. What current is drawn from the line if the supply voltage is 220 V?
When an electric lamp is connected to 12 V battery, it draws a current of 0.5 A. The power of the lamp is:
(a) 0.5 W
(b) 6 W
(c) 12 W
(d) 24 W
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What is the current I in the given circuit (Fig. )?
How does the heat produced by die passage of current in a metallic wire depend on the current in the wire?
What do you understand by ‘earthing’? What are the advantages of earthing in a household electric circuit? Explain, how it is done?
An Electric bulb is marked 100 W, 230 V. What find the energy consumed by the bulb in one hour.
