Tag: physics

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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

A solar water heater cannot be used to get hot water on:

  1. a sunny day.

  2. a cloudy day.

  3. hot day.

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

Solar devices are dependent on the sunlight for the generation of electricity. For the solar device to work efficiently, sunlight with good intensity should be available. Sunlight is weak during cloudy and rainy days. 

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 devices convert solar light to electricity?

  1. Wind mills

  2. Turbines

  3. Thermostat

  4. Solar Panels
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Solar panels are used to convert light (from solar energy) into electricity.

Wind mills harness wind energy to generate electricity.
Turbines are used in dams, which help in utilizing the kinetic energy of water in rivers.
Thermostat is a device used for maintenance of constant temperature. It is not used for energy production.  

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 ones are uses of solar panels?

  1. used in satellites and mars probe

  2. used in traffic signals

  3. used in calculators and toys

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

Solar panels can be used in calculators and battery operated toys, in satellites and Mars probes to provide them with energy to function in outer space by using the Sun's rays, can be used in traffic signals etc.

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
State whether the given statement is True or False :
Solar panels can produce electricity throughout the year. 

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Solar panels are dependent on the sunlight for the generation of electricity. For the solar panels to work efficiently, sunlight with good intensity should be available to fall on the panels. Sunlight is weak during cloudy and rainy days. Hence, solar panels cannot produce energy throughout the 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 estimation of solar constant?

  1. 1.4 kW per square meter

  2. 1.4 W per square meter

  3. 1.6 kW per square meter

  4. 1.4 kW per square centimeter
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Solar constant is defined as the mean amount of the solar energy received by the Earth's atmosphere, per unit of the area, during the time when the Earth is at the mean distance from the Sun. Solar constant equals to 1388 watts per square meter.

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 element is used in making solar cells?

  1. Gold

  2. Carbon

  3. Silicon

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

Solar cells are devices that converts Sun's radiation energy into electricity. Solar cells contains a semiconductor. Silicon is a good semiconductor that can be used for the production of solar cells.

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 water heater cannot be used to get hot water on

  1. a sunny day

  2. a cloudy day

  3. a hot day

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

A solar water heater cannot be used to get hot water on a cloudy day as there is no Sun which is necessary for the working of solar water heater.

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

State whether true or false :
While making food through solar cooker, vitamins of food get destroyed.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Solar cookers use thermal energy to cook food. While heat can affect some vitamins, the process does not inherently destroy all vitamins, and the statement is generally considered false in this context.

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

In parabolic solar cooker, the container of cooking is placed at the :

  1. Centre of curvature of mirror

  2. Focal point of the mirror

  3. Can be placed anywhere

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In parabolic solar cooker, the container of cooking is placed at the focal point of mirror so that all rays that are falling on solar cooker can converge to one point and produce large amount of heat energy.

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 solar device used in traffic signal light, works on which of  the following principle?

  1. Conservation of momentum

  2. Doppler effect

  3. Photovoltaic effect

  4. Electromagnetic induction
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The device used in traffic signal lights is Solar traffic light. are signalling devices powered by solar panels positioned at road intersections, pedestrian crossings and other locations to control the flows of traffic. 


Most solar traffic lights use LED lamps inside. These lamps work on the principle of Photovoltaic effect to work.
Hence correct answer is option C.