Physics 042 official model question paper with key for CBSE 12th Board Exam 2023
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CBSE +2 Physics official sample question paper with answer key for CBSE class 12 Board exam 2023 can be had from the links attached below.

Some sample questions from CBSE XII th Physics Model Paper 2023 are:

1. Two concentric and coplanar circular loops P and Q have their radii in the ratio 2:3. Loop Q carries a current 9 A in theanticlockwise direction. For the magnetic field to be zero at the common centre, loop P must carry
(i)    3A in clockwise direction
(ii)    9A in clockwise direction
(iii)    6 A in anti-clockwise direction
(iv)    6 A in the clockwise direction.

2. Which of the following statement is NOT true about the properties of electromagnetic waves?
(I) These waves do not require any material medium for their propagation
(ii)    Both electric and magnetic field vectors attain the maxima and minima at the same time
(iii)    The energy in electromagnetic wave is divided equally between electric and magnetic fields
(iv)    Both electric and magnetic field vectors are parallel to each other.

3. Two statements are given-one labelled Assertion (A) and the other labelled Reason ®. Select the correct answer to these questions from the codes (a), (b), © and (d) as given below.
a)    Both A and R are true and R is the correct explanation of A
b)    Both A and R are true and R is NOT the correct explanation of A
c)    A is true but R is false
d)    A is false and R is also false
ASSERTION:
In an interference pattern observed in Young’s double slit experiment, if the separation (d) between coherent sources as well as the distance (D) of the screen from the coherent sources both are reduced to 1/3rd, then new fringe width remains the same.
REASON:
Fringe width is proportional to (d/D).

4. A biconvex lens made of a transparent material of refractive index 1.25 is immersed in water of refractive index 1.33. Will the lens behave as aconverging or a diverging lens? Justify your answer.

Detailed +2 Physics question paper can be had from the below link.


Attached Files
.pdf   CBSE 12th Sample Question Paper 2023- Physics.pdf (Size: 1.1 MB / Downloads: 65)
.pdf   CBSE 12th Sample Paper 2023 answer key- Physics.pdf (Size: 1.13 MB / Downloads: 71)
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