ISC 2022 Physics - Specimen paper (Semester 2), Paper 1 with Answers
All 22 questions of the ISC 2022 Physics - Specimen paper (Semester 2), Paper 1, in printed order. Open a question to read it in full and see its answer.
- Q1(i) What is meant by a wavefront? 1 mark · Short answer
- Q1(ii) Find the de Broglie wavelength of electrons moving with a speed of $7 \times 10^6\text{ ms}^{-1}$. 1 mark · Numerical
- Q1(iii) State how a p-type semiconductor will be obtained from a pure crystal of a semiconductor. 1 mark · Short answer
- Q1(iv) In case of a regular prism, in minimum deviation position, angle made by the refracted ray (inside the prism) with the normal… 1 mark · MCQ
- Q1(v) In Young’s double slit experiment, what is the effect on fringe pattern if the slits are brought closer to each other? 1 mark · MCQ
- Q1(vi) First line of Balmer series ($H_\alpha$) in the spectrum of hydrogen is obtained when an electron of hydrogen atom goes from: 1 mark · MCQ
- Q1(vii) Which of the following graphs correctly represents the variation of maximum kinetic energy ($E_k$) of photoelectrons with the… 1 mark · MCQ
- Q2 What is meant by Constructive interference? In Young’s double slit experiment, what should be the phase difference between the… 2 marks · Short answer
- Q3(i) A thin converging lens of focal length $5\text{ cm}$ is used as a simple microscope. Calculate its magnifying power when image… 2 marks · Numerical
- Q3(ii) A thin converging lens of focal length $12\text{ cm}$ is kept in contact with a thin diverging lens of focal length… 2 marks · Numerical
- Q4 Define angular dispersion. State any one difference between a primary rainbow and a secondary rainbow. 2 marks · Short answer
- Q5 Explain the following terms: Intrinsic semiconductor. Extrinsic semiconductor. 2 marks · Short answer
- Q6(i) Calculate maximum kinetic energy of photoelectrons emitted by a metal (work function = $1\cdot5\text{ eV}$) when it is… 2 marks · Numerical
- Q6(ii) Calculate the minimum amount of energy which a gamma ray photon should have for the production of an electron and a positron pair. 2 marks · Numerical
- Q7(i) In a single slit diffraction experiment, how does the angular width of the central maxima change when: screen is moved away from… 3 marks · Short answer
- Q7(ii) Using Huygen’s wave theory of light, prove Snell’s law of refraction of light. 3 marks · Derivation
- Q8 Draw a ray diagram of a refracting astronomical telescope when final image is formed at infinity. Also write the expression for… 3 marks · Drawing
- Q9 Radius of curvature of an equi – convex lens of glass ($n = 1\cdot5$) is $30\text{ cm}$. Find its focal length. An object of… 3 marks · Numerical
- Q10 On the basis of Bohr’s theory, derive an expression for the radius of the nth orbit of an electron of hydrogen atom. 3 marks · Derivation
- Q11 Mr. Ravi had been living in a small town with his family for many years. He decided to shift to a city when he learnt that a… 3 marks · Case based
- Q12(i) Answer the following questions. Draw the circuit diagram of a full wave rectifier. Draw labelled graphs showing the input and… 3 marks · Drawing
- Q12(ii) With reference to Semiconductor Physics, Name the diode that emits spontaneous radiation when forward biased. Draw a labelled… 3 marks · Short answer