Subject

Science

Class

TET Class 12

Pre Boards

Practice to excel and get familiar with the paper pattern and the type of questions. Check you answers with answer keys provided.

Sample Papers

Download the PDF Sample Papers Free for off line practice and view the Solutions online.
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 Multiple Choice QuestionsMultiple Choice Questions

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21.

If the momentum of a body increases from 10 units to 25 units in 5 sec, then the force acting on it is

  • 1 unit

  • 2 units

  • 3 units

  • 4 units


C.

3 units

Increase in momentum of the body is given as =P

=25-10=15units

Time interval ,t=5 sec

Force acting on the body is F=pt=155=3 units.


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22.

Mica is used in cooking utensils because it is

  • good conductor of heat but bad conductor of electricity

  • bad conductor of heat but good conductor of electricity

  • good conductor of both heat and electricity

  • bad conductor of both heat and electricity


23.

The angle of dip at magnetic pole of earth is



  • 45°

  • 90°

  • 135°


24.

Sound waves consist of 20 compressions and 20 rarefactions in 10m length. The wavelength of the waves is

  • 25cm

  • 50cm

  • 75cm

  • 100cm


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25.

If 43 and 32 be respectively the absolute refractive indices of water and glass, then the refractive index of glass relative to water is

  • 89

  • 98

  • 43

  • 34


26.

In household wiring, what is the colour of 'earth wire'?

  • Red

  • Green

  • Black

  • White


27.

Kirchhoff's current law is based on the conservation of

  • energy

  • momentum

  • charge

  • mass


28.

The decimal equivalent of the binary number (1101)2 is

  • 9

  • 11

  • 13

  • 15


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29.

Which of the following is not a constituent of petroleum?

  • Petrol

  • Coke

  • Paraffin wax

  • Lubricating oil


30.

A metal M does not liberate hydrogen from acids but reacts with oxygen to give a black colour product. Identify M.

  • Na

  • Mg

  • Cu

  • Ca


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