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प्रश्न
Name the device or machine which convert :
Chemical energy into electrical energy.
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उत्तर
A cell, or battery, converts chemical energy into electrical energy.
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संबंधित प्रश्न
Show that the sum of kinetic energy and potential energy (i.e., total mechanical energy) is always conserved in the case of a freely falling body under gravity (with air resistance neglected) from a height h by finding it when
- The body is at the top.
- the body has fallen a distance x.
- the body has reached the ground.
Fill in the blank with suitable word :
The ability of a body to do work is called __________. The ability of a body to do work because of its motion is called __________.
Fill in the blank with suitable word :
The sum of the potential and kinetic energies of a body is called __________ energy.
What is the difference between potential energy and kinetic energy?
Name the device or machine which convert :
Electrical energy into sound energy.
Fill in the blanks with suitable words :
The principle of ___________ of energy says energy can be transformed from one form to another, but it cannot be ___________ or ___________.
How much electrical energy in joules does a 100 watt lamp consume : in 1 second?
How much electrical energy in joules does a 100 watt lamp consume : in 1 minute?
What do you understand by the term 'transformation of energy"? Explain with an example.
A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. The work done against the gravitational force will be (g = 10 m s–2)
