Tag: energy conversions
Questions Related to energy conversions
A helicopter takes off from the ground and rises vertically. It then hovers at a constant height
above the ground.
Which sequence of energy changes takes place during the gain in height?
The plants trap solar energy in the form of :
Identify the energy changes in the following cases
$A$: A car moving up a hill.
$B$: Photographic film is exposed to sun-light.
What are the various energy transformations that occur when you are riding a bicycle ?
A ball falls freely under gravity from rest. Name the kind of energy it will possess on reaching the ground.
As the water stored in the reservoir of a dam flows out, its potential energy changes to :
A battery lights a bulb. The electric energy on flowing through the filament of the bulb, first changes into ______ energy and then into the _______ energy.
A metal ball of mass $2kg$ is allowed to fall freely from rest from a height of $5m$ above the ground (Take $g=10ms^{-2}$). After the ball hits the ground and comes to rest, mechanical energy is converted to:
State whether the given statement is True or False :
Iron glows in red colour when it is heated to very high temperature because: