When a body falls freely from Class 12 TET Previous Year Board P

Subject

Science

Class

TET Class 12

Pre Boards

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Sample Papers

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 Multiple Choice QuestionsMultiple Choice Questions

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1.

When a body falls freely

  • its PE is converted into KE

  • its KE is converted into PE

  • its mechanical energy is converted into heat energy

  • None of the above


A.

its PE is converted into KE

When a body falls freely, the potential energy due to its height converted into kinetic energy due to its motion.


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2.

Heat energy of an object is

  • the average energy of the molecules of the object

  • the total energy of the molecules of the object

  • the average velocity of the molecules of the object

  • the average potential energy of the molecules of the object


3.

Taking into account, three isotopes of hydrogen and three isotopes of oxygen occurring in nature, how many different kinds of water molecules can we expect on the Earth?

  • Six

  • Nine

  • Twelve

  • Eighteen


4.

Which one of the following acids is present in Vitamin C?

  • Citric acid

  • Ascorbic acid

  • Lactic acid

  • Folic acid


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5.

Which of the following changes when a particle is moving with uniform velocity?

  • Speed

  • Acceleration

  • Velocity

  • Position


6.

Rocket works on the principle of conservation of

  • mass

  • energy

  • momentum

  • None of these


7.

Wisdom teeth normally grow during the age of

  • 12-15 yr

  • 17-30 yr

  • 34-40 yr

  • 40-45 yr


8.

Life of RBC in human blood is

  • 30 days

  • 60 days

  • 120 days

  • 15 h


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9.

The momentum of a heavy object at rest will be

  • zero

  • small

  • large

  • None of these


10.

The heating element in an electric iron is made of

  • iron

  • tungsten

  • nichrome

  • copper


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