Subject

Physics

Class

NEET Class 12

Test Series

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 Multiple Choice QuestionsMultiple Choice Questions

51.

Assertion: Photodiode and photovoltaic cell are based on the same principle.

Reason: Both use same method of operations to work.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


52.

Assertion: Transistor can be used as a switch. 

Reason:  Both linear and non-linear voltage bias dependence occurs in it.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


53.

Assertion:  When a white light is passed through a lens, violet light is more refracted than red light. 

Reason:  Focal length for red light is greater than violet.

  • If both assertion and reason are true and reason is the correct expalnation of assertion.

  • If both assertion and reason are true but reason not the correct explanation of assertion.

  • If assertion is true but reason is false

  • If both assertion and reason are false.


54.

Assertion: Microscope magnifies the image. 

Reason: Angular magnification for image is more than object in microscope.

  • If both assertion and reason are true and reason is correct explanation of assertion.

  • If both assertion and reason are true but reason is not correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


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55.

Assertion: Mass defect in nuclear reactions is less than 1%.

Reason: In nuclear reaction change in BE/N is generally less than 1%.

  • If both assertion and reason are true and reason is correct explanation of asertion.

  • If both assertion and reason are true and reason is not correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


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56.

Assertion:  It is very easy to detect neutrino in nature. 

Reason:  It has high affinity to interact with matter.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both asertion and reason are true and reason is not correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


D.

If both assertion and reason are false.

a neutrino is a subatomic particle that is very similar to an electron but has no electrical charge and a very small mass, which might even be zero.

Neutrinos are so hard to detect because they interact with other particles only very, very rarely. Interaction is so dared, a neutrino could go through a light year of lead and make it to the other side without even being deflected.

We are used to charge particles, like atoms with their electrons. Electrons have a strong electromagnetic force, so they resist being pushed through other electrons clouds. But neutrinos don't have and don't know about charge. Neutrinos pass through because they don't interact very strongly with anything.


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57.

Assertion:  In the transmission of long distance radio signals, short wave band is used. 

Reason: In shorter wavelength, attenuation is very less.

  • If both assertion and reason are true and reason is correct the explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


58.

Assertion:  There is a physical significance of matter waves. 

Reason:  Both interference and diffraction occurs in it.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


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59.

Assertion:  It is desirable to slow down fast moving neutrons to sustain controlled chain reactions. 

Reason:  Slow moving neutrons efficiently collides with  U235.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If assertion and reason are false.


60.

Assertion: Magnification of a convex mirror is always positive, but that of a concave mirror may be both positive or negative. 

Reason:  It depends on the sign convention chosen.

  • If both assertion and reason are true but reason is the correct explanation of assertion.

  • If both assertion are reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is not true.

  • If both assertion and reason are false.


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