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प्रश्न
Why using wood as fuel is not advisable although wood is a renewable source of energy?
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उत्तर
It is not advisable to use wood as fuel even though it can be replenished because the burning of wood produces smoke that causes pollution which results in environmental imbalance.
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संबंधित प्रश्न
Select the correct alternatives
The energy stored in an electric cell is
Give one relevant example for the following transformation of energy:
Electrical energy to heat energy.
State the changes in form of energy while producing hydro electricity.
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.
A light mass and a heavy mass have equal momentum. Which will have more kinetic energy?
(Hint : Kinetic energy K = P2/2m where P is the momentum.)
Select the renewable and non-renewable sources of energy from the following:
Water
What is wind energy?
The following are some of the energy transformations.
A. Electrical to light
B. Work to heat
C. Chemical to light
D. Electrical to sound
E. Mechanical to electrical
Identify the energy transformation that takes place in the following by inserting the corresponding letter in the shape provided.
(i) A candle flame
(ii) A torch is lighted
(iii) A microphone is used in a meeting
(iv) A cycle dynamo
(v) A piece of metal is being filed
A metal ball of mass 2kg is allowed to fall freely from rest from a height of 5m above the ground.
What the kinetic energy of the ball just before it hits the ground ?
State the energy changes which take place when:
A magnesium ribbon burns in air.
