Advertisements
Advertisements
प्रश्न
What are the advantages and disadvantages of using solar cells for producing electricity?
Advertisements
उत्तर
Advantages of Solar Cells:
(i) Solar cells have no moving parts, easy to construct, require little maintenance.
(ii) Solar cells derive their energy from solar radiation which is a renewable source of energy and also inexhaustible.
(iii) They are most suitable for the remote inaccessible and isolated places where laying a power transmission line may be expensive and not commercially viable.
(iv) They are environmentally friendly as they do not cause any pollution.
(v) Use of solar cells enables us to save the usage of fossil fuels as solar cells require no fuel.
Disadvantages of Solar Cells:
(i) The manufacturing cost of solar cells is sufficiently expensive.
(ii) The efficiency of energy conversion of solar energy to electricity is low.
(iii) The electricity produced in solar cells is direct current (DC) which cannot be directly used for many household appliances.
संबंधित प्रश्न
.A man raises a box of mass 50kg to a height of 2m in 20s, while another man raises the same box to the same height in 50s. Compare:
(i) the work done, and
(ii) the power developed by them.
Fill in the blank with suitable word :
The work done on a body moving in a circular path is __________
When is the work done by a force on a body : (a) positive, (b) negative, and (c) zero?
A force of 50 N acts on a body and moves it a distance of 4 m on horizontal surface. Calculate the work done if the direction of force is at an angle of 60° to the horizontal surface.
Name the physical quantity whose SI unit is Nm.
What is meant by a translational motion? Give one example.
How many joules are there in 1 mega joule?
A bullet is of mass 'm' g and is moving with a velocity 'v' m/s. Find the kinetic energy of the bullet when
(a) The mass is doubled,
(b) The velocity is tripled.
A proton is kept at rest. A positively charged particle is released from rest at a distance d in its field. Consider two experiments; one in which the charged particle is also a proton and in another, a positron. In the same time t, the work done on the two moving charged particles is ______.
