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प्रश्न
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उत्तर
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संबंधित प्रश्न
(i) The conversion of part of the energy into an undesirable form is called ______________.
(ii) For a given height h, __________________ the length l of the inclined plane, lesser will be the effort required.
State whether a solar cell produces a.c. or d.c.
Name two examples in which the mechanical energy of a system remains constant.
What do you understand by the potential energy of the body?
What kind of energy is possessed in a situation when?
A cocked up spring of air gun.
State the energy changes which take place when:
In a heat engine.
A body of mass m falls from a height h1 to a height h2, above the ground (h1 > h2). What is the loss of potential energy?
Obtain an expression for the kinetic energy of a body of mass m moving with a velocity v?
A body of mass m is taken from a height h to 2h. What is the increase in its potential energy?
What are the small particles that can be seen in a beam of light that enters a dark room?
