CBSE Class 12 Physics Solved Model Paper (Set - 1)

The experts at Team Jagran Josh have framed the Model Test Paper for Physics subject which strictly follows the Board pattern of CBSE Class 12 for the year 2016. The Model Test Paper is extremely beneficial for the Class 12 Students appearing for their respective examinations in 2016.

A few Questions from this Model Test Paper are given below:

Q. What is the condition for maximum potential in Van de graff generator?

Sol. In a Van de graff generator inorder to attain maximum potential, the hollow conducting shell should be large and leakage of charge should be minimised by housing the generator in a steel chamer filled with nitrogen or methane at high pressure.

Q. Why is it found experimentally difficult to detect neutrinos in nuclear β-decay?

Sol. Neutrinos are uncharged particles with almost no mass also, they interact very weakly with matter and are hard to detect. This is why; it is experimentally difficult to detect neutrinos in nuclear β-decay.

Q. Does incident photon essentially eject a photoelectron?

Sol. No, incident photon does not essentially eject a photoelectron. If the frequency of the incident photon is less than the threshold frequency, there will be no emission of photoelectrons at all.