ISC Physics 2024 Question Paper with Answers
All 39 questions of the ISC Physics 2024 Question Paper, in printed order. Open a question to read it in full and see its answer.
- Q1(A)(i) If potential difference between the two ends of a metallic wire is doubled, drift speed of free electrons in the wire: 1 mark · MCQ
- Q1(A)(ii) A metre bridge is balanced with a known resistance (R) in the left hand gap and an unknown resistance (S) in the right hand gap… 1 mark · MCQ
- Q1(A)(iii) Lorentz force in vector form is: 1 mark · MCQ
- Q1(A)(iv) When an electric current is passed through a moving coil galvanometer, its coil gets deflected. 1 mark · Assertion-reason
- Q1(A)(v) When a ray of white light is incident obliquely on the first surface of a prism, then 1 mark · MCQ
- Q1(A)(vi) The de-Broglie wavelength ($\lambda$) associated with a moving electron having kinetic energy ($E$) is given by: 1 mark · MCQ
- Q1(A)(vii) The majority charge carriers in a P-type semiconductor are 1 mark · MCQ
- Q1(B)(i) In an electric dipole, what is the locus of a point having zero potential? 1 mark · Short answer
- Q1(B)(ii) Three identical cells each of emf ‘e’ are connected in parallel to form a battery. What is the emf of the battery? 1 mark · Short answer
- Q1(B)(iii) Three bulbs $B_1(230\text{ V}, 40\text{ W})$, $B_2(230\text{ V}, 60\text{ W})$ and $B_3(230\text{ V}, 100\text{ W})$ are… 1 mark · Short answer
- Q1(B)(iv) Explain the meaning of the following statement: Curie temperature for soft iron is $770^\circ\text{C}$. 1 mark · Short answer
- Q1(B)(v) What type of wavefronts are associated with a point source of light? 1 mark · Short answer
- Q1(B)(vi) What is ‘Pair production’? 1 mark · Short answer
- Q1(B)(vii) In semiconductor physics, what is the function of a rectifier? 1 mark · Short answer
- Q2(i) A hollow sphere of radius R has a point charge q at its centre. Electric flux emanating from the sphere is X. How will the… 2 marks · Short answer
- Q2(ii) In case of an infinite line charge, how does intensity of electric field at a point change, if at all, when charge on it is… 2 marks · Short answer
- Q3 What is meant by the statement: “Relative permittivity of water is 81”? Can a body be given a charge of… 2 marks · Short answer
- Q4 What type of transformer is used in a mobile phone charger? Why is the core of a transformer made of soft iron and not of steel? 2 marks · Short answer
- Q5 Name the electromagnetic radiation whose frequency is $10^{11}\text{ Hz}$. What is the speed of radio waves in vacuum? 2 marks · Short answer
- Q6 Draw a labelled graph showing the variation in intensity of diffracted light with diffracting angle in a single slit Fraunhofer… 2 marks · Drawing
- Q7(i) Figure 1 below is the Energy level diagram for Hydrogen atom. Study the transitions shown and answer the following questions… 2 marks · Short answer
- Q7(ii) In a nuclear reactor, state the use of the following: Graphite rods Cadmium rods 2 marks · Short answer
- Q8 With reference to a semiconductor diode, define the following terms: depletion region potential barrier 2 marks · Short answer
- Q9 Obtain an expression for equivalent capacitance C when three capacitors $C_1$, $C_2$ and $C_3$ are connected in series. 3 marks · Derivation
- Q10(i) Figure 2 below shows two batteries $E_1$ and $E_2$ having emfs of $18\text{ V}$ and $10\text{ V}$ and internal resistances of… 3 marks · Numerical
- Q10(ii) Figure 3 below shows a potentiometer circuit in which the driver cell D has an emf of $6\text{ V}$ and internal resistance of… 3 marks · Numerical
- Q11 Using Biot-Savart law, show that magnetic flux density ‘B’ at the centre of a current carrying circular coil of radius R is given… 3 marks · Derivation
- Q12 Figure 4 below shows an infinitely long metallic wire YY’ which is carrying a current $I'$. P is a point at a perpendicular… 3 marks · Short answer
- Q13(i) Using Huygen’s wave theory, show that (for refraction of light): $\frac{\sin i}{\sin r} = \text{Constant}$ where terms have their… 3 marks · Derivation
- Q13(ii) In Young’s double slit experiment, show that: $\beta = \frac{\lambda D}{d}$ where the terms have their usual meaning. 3 marks · Derivation
- Q14 Figure 5 below shows a ray of monochromatic light LM incident on the first surface AB of a regular (equilateral) glass prism ABC… 3 marks · Numerical
- Q15 A student is performing an experiment to determine focal length of a convex lens by using an optical bench. State whether the… 3 marks · Short answer
- Q16 In an experiment on photo electric effect, how does stopping potential change, if at all, when intensity of incident… 3 marks · Short answer
- Q17 What is meant by forward biasing of a semiconductor diode? Draw a labelled characteristic curve (I-V graph) for a semiconductor… 3 marks · Drawing
- Q18(i) A $220\text{ V}$, $50\text{ Hz}$ ac source is connected to a coil having coefficient of self-inductance of $1\text{ H}$ and a… 5 marks · Short answer
- Q18(ii) When current flowing through a solenoid decreases from $5\text{ A}$ to 0 in $20\text{ milliseconds}$, an emf of $500\text{ V}$ is… 5 marks · Short answer
- Q19(i) On the basis of Bohr’s theory, derive an expression for the radius of the $n^{\text{th}}$ orbit of an electron of hydrogen atom… 5 marks · Derivation
- Q19(ii) Calculate mass defect and binding energy of ${}^{20}_{10}\text{Ne}$ nucleus, given: Mass of… 5 marks · Numerical
- Q20 There are two types of optical instruments: Microscopes and Telescopes. Microscopes are used to magnify very tiny objects whereas… 5 marks · Case based