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प्रश्न
Why does not the heating coil produce any visible light? in an electric stove.
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उत्तर
It is because, the temperature of heating element is around 1000°C, whereas visible light is produced if the temperature rises above 1500°C.
संबंधित प्रश्न
What determines the rate at which energy is delivered by a current?
Distinguish between kilowatt and kilowatt-hour.
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A resistor of resistance R is connected to an ideal battery. If the value of R is decreased, the power dissipated in the resistor will ______________ .
An electric bulb, when connected across a power supply of 220 V, consumes a power of 60 W. If the supply drops to 180 V, what will be the power consumed? If the supply is suddenly increased to 240 V, what will be the power consumed?
Point out two main disadvantages of ‘Tree System’.
Name three main characteristics of an heating element.
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