Tag: energy production

Quizzes (23) Questions (80)

Questions Related to energy production

Multiple choice physics energy production causes of greenhouse effect global warming adaptation in animals

What is the best thing to do when strong winds are blowing over a hut having a weak thatched roof ?

  1. Open the doors and windows

  2. Close all the doors and windows

  3. Make holes in the roof

  4. Burn wood inside
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The correct answer is option(A).

High speed winds reduces the pressure above the roof. While the air pressure below the roof is high which pushes the roof upwards. To avoid this we have to open the doors and windows so that air is moving leading to lower pressure in the hut.

Multiple choice physics energy production causes of greenhouse effect global warming adaptation in animals

What will be the effect of global warming at the poles?

  1. Decreasing of temperature

  2. Increasing of temperature

  3. constant of temperature

  4. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Due to global warming the temperature of earth's atmosphere in increasing, and the temperature at poles is also increasing. This increase in temperature at poles will melt the ice on poles , and will melt the glaciers and after some time the poles will be iceless. This will result in increase in the level of oceans which in turn may sink the coastal land areas.

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.