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# CBSE Class 12 Physics Term 2 Exam 2022: CBSE Releases Additional Practice Questions | Full Details

## Ahead of the CBSE Class 12 Physics Term 2 Exam, the Central Board of Secondary Education (CBSE) has released additional practice questions for the paper.

Published: March 31, 2022 7:34 PM IST

By India.com News Desk | Edited by Snigdha Choudhury

CBSE Class 12 Physics Term 2 Exam 2022: CBSE Class 12 Physics paper of the Term 2 CBSE board exam 2022 is scheduled to be held on May 20. Ahead of the CBSE Class 12 Physics Term 2 Exam, the Central Board of Secondary Education (CBSE) has released additional practice questions for the paper. The CBSE Class 12 Physics paper consists of three sections and time for completing the paper is two hours. The additional practice questions for the CBSE Class 12 Physics paper was released on the board’s official website cbseacademic.nic.in.

## Check the additional practice questions released by CBSE for Class 12 Physics Term 2 Exam 2022

SECTION A

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1.  (a) An n-type semiconductor material is produced by adding impurity atoms to a pure
semiconductor material. How many valence electrons will the impurity atoms have in
their outer shell? What will the net charge be on the semiconductor material after
(b) What is the purpose of the following devices?
i. A photodiode in reverse bias
ii. An LED in forward bias
[2 marks]

2. (a) An electron of mass m and a photon carry the same energy E. What is the ratio of
de Broglie wavelength associated with the electron to the wavelength of the photon?
(b) Why do macroscopic objects in our daily life not show wave-like properties
whereas in the sub-atomic domain the wave-like character is significant?
[2 marks]
OR
The table below lists the different transitions of an electron in a hydrogen atom:

• ni = 4 to nf = 2
• ni = 3 to nf = 1
• ni = 2 to nf = 3
• ni = 4 to nf = 3

Among these, identify:

(a) the transition that gives absorption spectra.
(b) the transition that gives Lyman spectral line, Balmer spectral line, and Brackett
spectral line.
[2 marks]

3. (a) Define barrier potential across a p-n junction. What is the impact on the barrier
potential when the p-n junction is connected in forward bias?
(b) How does the current change as the voltage applied across the p-n junction varies
from small to very high in reverse bias condition?

Students can download the PDF of the additional practice questions for the CBSE Class 12 Physics Term 2 Exam 2022.

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