Tag: solar power plant

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Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

The cost of solar cells is

  1. decreasing exponentially

  2. decreasing slowly

  3. constant

  4. increasing
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The cost of solar cells is reducing exponentially.

Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

The use of solar energy on large scale becomes harder because:

  1. Its installation cost is often more than conventional systems.

  2. Storing of large amounts of D.C. is not easy.

  3. It requires a huge area of exposure to sunlight to gather substantial energy.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Solar energy production on a large scale is difficult on a large scale because:

1. Its installation cost is much more than conventional systems because of the delicate substances.
2. Output of solar energy conversion is DC and storing DC is difficult and costly on a large scale.
3. To efficiently supply the demands on large scale, huge areas of land are required to get sufficient exposure of Sun.

Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

Solar cooker is painted black from inside so that:

  1. Less heat is lost

  2. Less heat is radiated

  3. More heat is amplified

  4. More heat is trapped
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Black surfaces are good absorbers and good radiators of heat and hence painting the surface black traps more heat and improves the efficiency of solar cooker.

Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

The reflector on top of solar cooker is used to:

  1. diverge solar energy

  2. focus solar energy

  3. focus light energy

  4. reflect excess energy to surroundings
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The reflector on the top of the solar cooker is used to focus the solar energy over the glass surface. The mirror reflects the heat energy in a confined area and increases the net input energy to the solar cooker.

Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

The semiconductor panel on the front of a scientific calculator is

  1. Electric Cell

  2. Solar Cell

  3. Plane mirror

  4. Convex mirror
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Solar cells are fitted on a scientific calculator.

Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

Solar cell production is

  1. increasing slowly

  2. increasing exponentially

  3. constant

  4. decreasing
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Production of solar cells is increasing exponentially every year.

Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

What is the principle of working of solar cell

  1. photovoltaic effect

  2. green house effect

  3. Archimedes' principle

  4. Faraday's law
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Solar cell works on the principle of photovoltaic effect according to which free electrons are produced when light of certain wavelength is incident on semiconductors.

Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

The reflector on top of solar cooker is adjustable because of:

  1. revolution of Earth about Sun.

  2. rotation of Earth about Sun.

  3. atmospheric profile of gases.

  4. density variation in atmosphere.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Rotation of Earth about the Sun causes the position of Sun to change during the day. Hence, the mirror on the top of the solar cooker needs adjusting during the day to focus the rays in a small area.

Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

A solar cooker works on:

  1. electrical energy

  2. magnetic energy

  3. solar energy

  4. chemical energy
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Solar cooker is a device used to collect the solar energy in the form of heat.

Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

Which of the following will improve the efficiency of a solar cooker? 

  1. Regularly orienting the solar cooker according to the Sun.

  2. Increasing the span of glass sheet on the top.

  3. Using black coated utensils.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

To improve the efficiency of a solar cooker, the following steps need to be done:

1. The top mirror of the solar cooker focusses the solar energy onto a small area. Adjusting the mirror helps in continuous focussing of heat energy.
2. Increasing the span of glass sheet on the top allows trapping more energy in the solar cooker.
3. Black coated utensils increases the absorption of heat radiations and increases the efficiency.