Tag: production of electricity from solar energy

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Questions Related to production of electricity from solar energy

Multiple choice physics energy production solar power plant production of electricity from solar energy solar equipment

Solar water heater can be used in hospitals for hot water supply.

  1. True

  2. False

  3. Ambiguous

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

Answer is A.

Solar water heating is now a mature technology. Wide spread utilization of solar water heaters can reduce a significant portion of the conventional energy being used for heating water in homes, factories and other commercial and institutional establishments. 
Around 60 deg. 80 deg. C temperature can be attained depending on solar radiation, weather conditions and solar collector system efficiency
Hot water for homes, hostels, hotels, hospitals, restaurants, dairies, industries etc. It can be installed on roof-tops, building terrace and open ground where there is no shading, south orientation of collectors and over-head tank above SWH system.
Hence, the given statement is true.

Multiple choice physics energy production solar power plant production of electricity from solar energy solar equipment

Solar cell is a device which directly converts _______ into electric energy.

  1. heat energy

  2. mechanical energy

  3. chemical energy

  4. solar energy
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Solar cell is a device which directly converts solar energy into electric energy.
A solar cell, or photovoltaic cell, is an electrical device that converts the energy of light(sun)  directly into electricity by the photovoltaic effect. It is a form of photoelectric cell, defined as a device whose electrical characteristics, such as current, voltage, or resistance, vary when exposed to light. Solar cells are the building blocks of photovoltaic modules, otherwise known as solar panels.

Multiple choice physics energy production solar power plant production of electricity from solar energy solar equipment

Solar panels can be used in electronic watches.

  1. True

  2. False

  3. Ambiguous

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

The statement is true, with upcoming technologies there are solar panels present in watches and these use solar energy to power these watches and for night time there is a small rechargable battery inside the watch,which gets charged enough in day-or during sunlight to power the watch when sunlight is off.

Multiple choice physics energy management solar power plant production of electricity from solar energy solar energy and its applications

The temperature of the biodigester is kept around $35^{\circ}C$, so as to sustain the fermentation of animal during slurry.

  1. True

  2. False

  3. Ambiguous

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

Answer is A.

This is a complex process by which organic matter is decomposed by anaerobic bacteria. The decomposition process produces a gaseous byproduct often called biogas, which consists primarily of methane, carbon dioxide, and hydrogen sulfide. It occurs in nature and can be used to produce biogas from biomass in an anaerobic digestor. 
To optimize the digestion process, the biodigester must be kept at a consistent temperature, as rapid changes will upset bacterial activity. In most areas of the United States, digestion vessels require some level of insulation and/or heating. Some installations circulate the coolant from their biogas-powered engines in or around the digester to keep it warm, while others burn part of the biogas to heat the digester. In a properly designed system, heating generally results in an increase in biogas production during colder periods.
Hence, the statement is true.

Multiple choice physics energy management solar power plant production of electricity from solar energy solar energy and its applications

The ................ animal dung left after the production of biogas is an excellent manure.

  1. spent

  2. coal

  3. methane

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

The dried manure left after the biogas process is even richer than ordinary muck and makes a fantastic organic fertilizer.
Hence, The spent animal dung left after the production of biogas is an excellent manure.

Multiple choice physics energy management solar power plant production of electricity from solar energy solar energy and its applications

State whether true or false :
In solar dryer, we can keep dried fruits for longer duration of time.

  1. True

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

 Solar dryer is one of the oldest methods of preserving food for later use.  Foods can  be dried in the sun, in an oven or in a food dehydrator by using the right. So we can dried fruits for longer duration of time.

Multiple choice physics energy management solar power plant production of electricity from solar energy solar energy and its applications

State whether true or false :
Solar dryer works on the principle of conversion of solar energy into heat energy.

  1. True

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

The basic function of a solar dryer is to heat air to a constant temperature with solar energy hence Solar dryer works on the principle of conversion of solar energy into heat energy.