Tag: physics

Quizzes (598) Questions (13441)

Questions Related to physics

Multiple choice physics bharat and science introduction to science contribution of physics in technology and society physics in relation to other sciences

Which of the following phenomena will not be observed on the surface of the Moon ?

  1. Rising and setting of the Sun

  2. Solar eclipse

  3. Motion of comets

  4. Twinkling of stars
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Moon has no atmosphere to scatter light. Twinkling of stars is caused by the refraction of light through the Earth's atmosphere; therefore, it cannot be observed from the Moon.

Multiple choice physics physical world introduction to science contribution of physics in technology and society physics in relation to other sciences

Who was the first woman to fly in space?

  1. Valentina Tereshkova

  2. Rhea Seddon

  3. Sally Ride

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

Valentina Vladimirovna Tereshkova is a retired Soviet cosmonaut and the first woman to have flown in space, having been selected from more than four hundred applicants and five finalists to pilot Vostok 6 on 16 June 1963.

Multiple choice physics sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy biogas environmental use of microorganism microbes in waste treatment and biogas

In a wind mill the electric energy is converted into mechanical energy.         

  1. True

  2. False

  3. Ambiguous

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

Answer is B.
Windmills, like waterwheels, were among the original prime movers that replaced animal muscle as a source of power. They were used for centuries in various parts of the world, converting the energy of the wind into mechanical energy for grinding grain, pumping water, and draining lowland areas.
Kinetic energy of the wind is transformed into mechanical energy of the turning windmill. This can be used to turn a generator to generate electricity. The original energy to cause the wind to blow came from the sun. Uneven heating of the earth's surface causes wind.
Hence, the statement is false.

Multiple choice physics sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy biogas environmental use of microorganism microbes in waste treatment and biogas

65% by volume is hydrogen gas in the biogas. 

  1. True

  2. False

  3. Ambiguous

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

Answer is B.

Biogas is characterized based on its chemical composition and the physical characteristics which result from it. It is primarily a mixture of methane (${ CH } _{ 4 }$) and inert carbonic gas (${ CO } _{ 2 }$). However the name 'biogas' gathers a large variety of gases resulting from specific treatment processes, starting from various organic waste - industries, animal or domestic origin waste, etc . 
Hence, the statement is false.

Multiple choice physics sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy biogas environmental use of microorganism microbes in waste treatment and biogas

The gas obtained by the fermentation of biomass is :

  1. LPG

  2. CNG

  3. hydrogen

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

Fuel-grade ethanol is one energy source that has great potential for being generated from biomass. The gas obtained by the fermentation of biomass is called biogas.

Multiple choice physics towards green energy renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy

Fill  in the blank.

Renewable source of energy is ______ .

  1. coal

  2. fossil fuel

  3. natural gas

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

Renewable energy is generally defined as energy that comes from resources which are naturally replenished on a human time scale such as sunlight, wind, rain, tides, waves and geothermal heat. Hence, Sun is naturally coming and can be used in the form of solar energy, to evaporate water which turns into rain and rains are useful in many uses. Ultimately, Sun is the renewable source of energy.