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प्रश्न
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संबंधित प्रश्न
Name the physical quality which is measured in
(i) Kw (ii) kWh
Distinguish between kilowatt and kilowatt-hour.
1kWh = …….. J
Define Kilo watt hour.
What is the energy conversion when an electric current passes through a metallic wire?
Which cable, one rated 15A and the other rated 5A will be thicker? Give a reason.
What changes in energy occur in an electric bulb?
An electric filament lamp is connected to a supply of voltage higher than the recommended value. Give reasons, why compared with a normal performance, the lamp emits a brighter light and its life is shortened.
Three 250 W heaters are connected in parallel to a 100 V supply, Calculate the energy supply in kWh to the three heaters in 5 hour.
A torch bulb is rated at 3 V and 600 mA. Calculate it’s
- power
- resistance
- energy consumed if it is used for 4 hours.
