Tag: solar equipment

Quizzes (7) Questions (87)

Questions Related to solar equipment

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

Which of the following is/are macroscopic variables:

  1. Volume

  2. Temperature

  3. Pressure

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

Macroscopic variable is a measurable quantity used to describe the complete state of the system. The state of a macroscopic system in equilibrium can be described in terms of measurable properties as temperature, pressure, and volume, which are also known as thermodynamic variables.

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

Which of the following are macroscopic properties?

  1. texture

  2. phase

  3. viscosity

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

$Answer:-$ D

Macroscopic properties are qualities that can be seen by the naked eye, and some are relative to the conditions under which a material or element is observed. The three most basic examples of macroscopic properties are color, shape and size.

Other examples of macroscopic properties include texture, phase (solid, liquid or gas), viscosity (if any) and density relative to surroundings (such as oil on water). The properties of an element or material tend to change, even if only slightly, as the conditions change. Examples of changing conditions include how metals tend to glow red when heated to extreme temperatures, how the viscosity of honey decreases with temperature or how the volume of $H _2O$ increases slightly when it freezes.

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.