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संबंधित प्रश्न
State the energy change in the following device while in use:
A loudspeaker
Define the term kinetic energy. Give one example of a body which possesses kinetic energy.
State the energy changes in the following case while in use:
a ceiling fan
State two advantages of using nuclear energy for producing electricity.
A hydroelectric power station takes its water from a lake whose water level is 50 m above the turbine. Assuming an overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1 MW. (Take g = 10 m s−2).
Give one example when:
Potential energy changes to electric energy.
Draw a diagram to show the energy changes in an oscillating simple pendulum. Indicate in your diagram how the total mechanical energy in it remains constant during the oscillation.
Can you tell?
What are the various forms of energy?
What are the small particles that can be seen in a beam of light that enters a dark room?
Name the type of energy (kinetic energy K or potential energy U) possessed in the following case:
A moving bus
