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.

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.

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.

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.