CBSE Board Paper Solution-2020

Class : XII Subject : Physics Set : 1 Code No : 55/2/1 Time Allowed : 3 hours Maximum Marks : 70

General Instructions:

Read the following instructions very carefully and strictly follow them:

1. This question paper comprises four sections-A, B, C, and D.
2. There are 37 questions in the question paper. All questions are compulsory.
3. Section A: Q. no. 1 to 20 are very short-answer type questions carrying 1 mark each.
4. Section B: Q. no. 21 to 27 are short-answer type questions carrying 2 mark each.
5. Section C: Q. no. 28 to 34 are long-answer type questions carrying 3 mark each.

1. Section A: Q. no. 35 to 37 are very long answer type questions carrying 5 mark each

1. There is no overall in the question paper. However, an internal choice has been provided in two questions of one mark, two questions of two marks, one question of three marks and all the three questions five marks. You have to attempt only one of the choices in such questions.

1. However, separate instructions are given with each section and question, wherever necessary.
2. Use of calculators and log tables is no permitted.
3. You may use the following values of physical constants wherever necessary:

<math>c = 3 \times 10^8 \text{ m/s}</math>

<math>h = 6.63 \times 10^{-34} \text{ Js}</math>

<math>e = 1.6 \times 10^{-19} \text{ C}</math>

<math>\mu_0 = 4\pi \times 10^{-7} \text{ T m A}^{-1}</math>

<math display="block">\epsilon_0 \, = 8.854 \times 10^{-12} \, C^2 \, \, N^{-1} \, m^{-2}</math>

<math>\frac{1}{1}</math> = 9 × 10⁹ Nm² C^-2

<math>4\pi\epsilon_0</math>