Class 12 Physics Previous Year Question Paper 2019 (Set – 1 & 2) with Solutions

CBSE Students who are preparing for upcoming 12th physics exam must practice this class 12 physics solved PYQ 2019. This will be very helpful for students in their exam preparation. Students can understand the exam pattern, question difficulty and also can do self analysis with the help of this PYQ.

We have also given solutions of each question so that student can cross check their answer. Practising Class 12 physics Previous Year Question papers 2019 before exam can boost confidence in students and students can score better marks in exam. Different set of PYQ has given in this post and CBSE experts have prepared solutions of this PYQ.

Class 12 Physics PYQ 2019 SET 1 Question
Class 12 Physics PYQ 2019 SET 1 Solution
Class 12 Physics PYQ 2019 SET 2 with Solution

Class 12 Physics PYQ 2019 SET 1 Question

Class 12 Physics PYQ 2019 SET 1 Solution

Class 12 Physics PYQ 2019 SET 2 with Solution

Class 12 Physics PYQ 2025
Class 12 Physics PYQ 2026

CBSE exam is usually held between feb and April every year. And for many students, this exam decides their career specially who want to pursue a career in physics. Practising only chapter is not enough for scoring good marks in exam. Solving Class 12 Physics PYQs is also important.

We hope students found this class 12 physics solved PYQ 2019 helpful for them. Keep learning if you have any questions you can ask in comment section. Also you can also help your friend by sharing this post to them

Important Question of Class 12 Physics PYQ 2019

Question

Explain with the help of Einstein’s photo electric equation any two observed features in photoelectric effect which cannot be explained by wave theory.

SOLUTION:

These are the two features of Photoelectric effect which can not be explained by wave theory but can be explained through Einstein’s photoelectric equation:

1. For a given metal and a given frequency of incident radiation, the number of photoelectrons ejected per second is directly proportional to the intensity of the incident light.

2. For a given metal, there exists a certain minimum frequency of the incident radiation below which no emission of photoelectrons takes place. This frequency is called the threshold frequency.

Question

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.

SOLUTION:

Signal transmitted from a TV tower cannot be received beyond a certain distance because of the curvature of the earth.

Expression for the optimum separation between the receiving and transmitting antenna:$$d = \sqrt{2hR}$$

where,

• d: Optimum separation.
• h: Height of the antenna.
• R: Radius of the curvature of Earth.

Question

(a) Identify the part of the electromagnetic spectrum used in (i) radar and (ii) eye surgery. Write their frequency range.

(b) Prove that the average energy density of the oscillating electric field is equal to that of the oscillating magnetic field.

SOLUTION:

(a) The microwave range of the electromagnetic spectrum with frequency range 1.6 to 300 GHz and wavelength range 187 to 10 mm are used in operating radar and ultraviolet range with frequency

and wavelength 400 nm to 10 nm are used in eye surgery.

(b) Energy density in the electric field is

Energy density in magnetic field is

We know E = Bc