EASY
Earn 100

The principle of solar cell is to convert sunlight into electricity through the phenomena of photovoltaic effect.   

50% studentsanswered this correctly

Important Questions on Energy

MEDIUM

In a Solar Furnace, sunlight is concentrated at the ________ of the concave mirror.

EASY
Gobar gas contains mainly:
EASY

880 MW Kaiga atomic power plant is situated near the river Kali in the Indian State of:

MEDIUM
The Atomic Power Plant with the largest capacity (540 MWe) is located in:
EASY
Gobar gas contains mainly _____. 
MEDIUM
The Cabinet Committee on Economic Affairs (CCEA) has recently (July 2016) approved setting up of 1,980 MW 'Ghatampur Thermal Power Project' at an estimated cost of Rs. 17,237.8 crore in the Indian State of :
HARD

A diagram of OTEC (Ocean Thermal Energy Conversion) system is given below. In which part water is converted into water vapours?  

Question Image

EASY
What is the energy transformation that takes place in a solar cell?
HARD

Sunlight of intensity of 700 Wm-2 is captured with 70% efficiency by a solar panel, which then sends the captured energy into a house with 50%efficiency. a. The house loses thermal energy through bad insulation at a rate of 3.0 kW. Find the area of the solar panel needed in order to keep the temperature of the house constant. 

MEDIUM

The graph shows the variation with the incident solar intensity I of the temperature of a solar panel used to heat water. Thermal energy is extracted at a rate of 320 W . The area of the panel is  2.0 m2. Calculate, for a solar intensity of 400 W/m2, the temperature of the water,

Question Image

 

MEDIUM

What are the advantages and limitations of solar energy?

HARD

A diagram of OTEC (Ocean Thermal Energy Conversion) system is given below. In which part water is converted into water vapours?  

Question Image

EASY
In the solar water heater, energy is transformed into which form?
MEDIUM
During which seasons a solar cooker can not be used?
EASY
Why is it not possible to use solar cells to meet our energy needs? State three reason to support to your answer.
HARD
Distinguish between a solar panel and a photovoltaic cell.
EASY

Write the quadrants in which the following points lie:

-4,7

EASY
Why are the pipes of solar water heater made up of copper?
HARD
When we harness wind energy, we harness solar energy indirectly. Explain, why?  
MEDIUM
What are the benefits of a solar cooker?