Multiple Choice Questions

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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.


A.

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

Nuclear binding energy is the energy required to split a nucleus of an atom into its components parts: protons and neutrons or collectively the nucleons. The binding energy of nuclei is always a positive number since all nuclei require net energy to separate them into individual protons and neutrons.

Mass defect:- Nuclear binding energy accounts for a noticeable difference between the actual mass of atom's nucleus and its expected mass based on the sum of the masses of its non-bound components.


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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.


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.


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.


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.


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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.


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.


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.


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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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.