Multiple Choice Questions

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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.


A.

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

A photodiode is a type of light detector that converts light into voltage or current on the mode of operation of device.

Photovoltaic (PV) effect is the conversion of sunlight energy into electricity. When the sunlight hit the cell in light excites some of the electrons in semiconductors to become electron-hole pairs.


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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:  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: 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: 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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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.


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:  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.


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.


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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.