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प्रश्न
A battery lights a bulb. Describe the energy changes involved in the process.
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उत्तर
- When a bulb is connected to a battery, then the chemical energy of the battery is transferred into electrical energy.
- When the bulb receives this electrical energy, then it converts it into light and heat energy.
- Hence, the transformation of energy in the given situation can be shown as:
Chemical Energy → Electrical Energy → Light Energy + Heat Energy
संबंधित प्रश्न
Define 1 watt of power.
Define average power.
Define kilowatt-hour.
What is the power of a body which is doing work at the rate of one joule per second?
A car of weight 20000 N climbs up a hill at a steady speed of 8 m/s, gaining a height of 120 m is 100 s. Calculate : work done by the car.
A car of weight 20000 N climbs up a hill at a steady speed of 8 m/s, gaining a height of 120 m is 100 s. Calculate : power of engine of car.
Define power. Give the SI unit of power.
In loading a truck, a man lifts boxes of 100 N each through a height of 1.5 m.
If the man lifts 4 boxes per minute, at what power is he working?
(g = 10 m s−2)
Which one of the following statements about power stations is not true?
How is the power related to the speed at which a body can be lifted? How many kilograms will a man working at the power of 100 W, be able to lift at a constant speed of 1 m s–1 vertically? (g = 10 m s–2)
