Advertisements
Advertisements
Question
State the energy changes which take place when:
Water stored in dams rotates turbine connected to a dynamo.
Advertisements
Solution
The potential energy of stored water changes to kinetic energy of flowing water, The kinetic energy of the flowing water rotates turbine. The turbine, in turn, rotates the coil of the generator and changes into electric energy.
RELATED QUESTIONS
(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.
Give one example of a body that has potential energy, in due to its state.
Name the type of energy (kinetic or potential) possessed by the following:
A bullet fired from a gun.
Name the type of energy (kinetic energy K or potential energy U) possessed in the given case:
An arrow shot out of a bow.
Write an expression for the potential energy of a body of mass m placed at a height h above the earth's surface. State the assumptions made, if any.
How is wind energy used to produce electricity?
Show that the quantity 2K/v2 has the unit of mass, where K is the kinetic energy of the body.
What do you understand by the kinetic energy of the body?
The solar cooker is an application of the ______ energy of the sun, while solar cells, solar lamps are applications of the ______ energy of the sun.
