CBSE Class 12 Physics Question Paper Solved 2019 Set C

CBSE Class 12 Physics Question Paper Solved 2019 Set C. Students can download the last year board exams question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in examinations.

SECTION – A

1. Distinguish between unpolarized and linearly polarized light.

2. Define the term “threshold frequency”, in the context of photoelectric emission.

OR

Define the term “Intensity” in photon picture of electromagnetic radiation.

3. How is the drift velocity in a conductor affected with the rise in temperature ?

4.In sky wave mode of propagation, why is the frequency range of transmitting signals restricted to less than 30 MHz ?

OR

On what factors does the range of coverage in ground wave propagation depend ?

5. Draw the pattern of electric field lines when a point charge +q is kept near an uncharged conducting plate.

SECTION – B

6. Why a signal transmitted from a TV tower cannot be received beyond a certain distance ? Write the expression for the optimum separation between the receiving and the transmitting antenna.

7. State Bohr’s quantization condition of angular momentum. Calculate the shortest wavelength of the Bracket series and state to which part of the electromagnetic spectrum does it belong.

OR 

Calculate the orbital period of the electron in the first excited state of hydrogen atom. 

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