Advertisements
Advertisements
प्रश्न
How is kilowatt hour related to joule?
Advertisements
उत्तर
1 kWh is the work done by a source of power 1 kW in 1 h, i.e.,
1 kWh = 1 kW × h = 1000 J s-1 × 3600 s = 3.6 × 106 J
1 Kilowatt hour = 3.6 × 106J
APPEARS IN
संबंधित प्रश्न
A coolie X Carrying a load on his head climbs up a slope and another coolie Y carrying the identical load on his head move the same distance on a frictionless horizontal platform. Who does more work? Explain the reason.
What do you mean by a centrifugal force?
In which one of the following cases is the work done more? When the angle between the direction of motion and that of the force is (i) 90° (ii) 0°.
A boy takes 3 minutes to lift a 20 litre water bucket from a 20 m deep well, while his father does it in 2 minutes.
How much work each does? Take density of water = 103 kg m-3 and g = 9.8 N kg-1.
State the condition when the work done by the force is positive
State the condition when the work done by the force is negative.
State the C.G.S. unit of work. How it is related to its S.I. unit?
A coolie carries a load of 30 kgf through a distance of 500 m in 5 minutes while another coolie B carries the same load through the same distance in 10 minutes. Compare the
(i) work done, and
(ii) power developed. (Take: g = 10md−2)
For the following scenario, state whether the work done by gravity is positive, negative, or zero.
A car in neutral gear is coming down the slope.
