Tag: production of electricity from solar energy

Questions Related to production of electricity from solar energy

Which is NOT an advantage of solar cooker?

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

  1. It has no moving parts.

  2. It requires a lot of maintenance.

  3. It can be used in remote areas.

  4. It does not cause any pollution.

Show answer
Correct Option: B
Explanation:

Solar panel is a very useful device. Some of its major advantages are:

1. As it has no moving parts during operation, energy loss due to friction is absent.
2. It can be used in any region where there is sufficient sunlight.
3. It does not cause any pollution and produces no byproducts.

The disadvantage with solar cooker is that it requires a lot of maintenance. The mirrors and the glass need to be kept clean. The orientation of mirrors need to be changed at regular times in a day as sun changes its position.

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

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

  1. a sunny day.

  2. a cloudy day.

  3. hot day.

  4. windy day.

Show answer
Correct Option: B
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. 

Which of the following devices convert solar light to electricity?

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

  1. Wind mills

  2. Turbines

  3. Thermostat

  4. Solar Panels

Show answer
Correct Option: D
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.  

Which ones are uses of solar panels?

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

  1. used in satellites and mars probe

  2. used in traffic signals

  3. used in calculators and toys

  4. All of the above

Show answer
Correct Option: D
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.

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

  1. True

  2. False

Show answer
Correct Option: B
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.

What is estimation of solar constant?

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

  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

Show answer
Correct Option: A
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.

Which of the following element is used in making solar cells?

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

  1. Gold

  2. Carbon

  3. Silicon

  4. Silver

Show answer
Correct Option: C
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.

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

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

  1. a sunny day

  2. a cloudy day

  3. a hot day

  4. a windy day

Show answer
Correct Option: B
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.

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

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

  1. True

  2. False

Show answer
Correct Option: B

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

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

  1. Centre of curvature of mirror

  2. Focal point of the mirror

  3. Can be placed anywhere

  4. None of these

Show answer
Correct Option: B
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.