ISC Physics 2026 Question Paper with Answers
All 39 questions of the ISC Physics 2026 Question Paper, in printed order. Open a question to read it in full and see its answer.
- Q1(A)(i) A fish called an electric eel can generate a voltage up to 800V. If it can supply a current of 5mA, the maximum power it can… 1 mark · MCQ
- Q1(A)(ii) A collimated beam of protons is travelling with a constant velocity along X-axis. There is a current carrying solenoid whose axis… 1 mark · MCQ
- Q1(A)(iii) An electron, a proton, a deuteron and an alpha particle are all accelerated from rest through the same potential difference… 1 mark · MCQ
- Q1(A)(iv) Magnetic susceptibility ( $\chi$ ) of a material is found to decrease with the rise in its temperature. The material is: 1 mark · MCQ
- Q1(A)(v) When a p-n junction diode is forward-biased 1 mark · MCQ
- Q1(A)(vi) When a biconvex lens of glass of refractive index 1.6 was dipped in a certain transparent liquid, it was found to behave like a… 1 mark · MCQ
- Q1(A)(vii) In Young's double slit experiment, the first bright band for blue light is closer to the centre than the first bright band for… 1 mark · Assertion-reason
- Q1(B)(i) Calculate the momentum of a photon having an energy of $4\cdot8\times10^{-19}\text{ J}.$ 1 mark · Numerical
- Q1(B)(ii) What is motional emf? 1 mark · Short answer
- Q1(B)(iii) Calculate work done in moving a point charge 'q' through a distance 'd' along perpendicular bisector of an electric dipole, which… 1 mark · Numerical
- Q1(B)(iv) Draw the symbol of a Zener diode. 1 mark · Drawing
- Q1(B)(v) A thin convex lens of power 5D is kept in contact with a thin concave lens of power 8D. Calculate the focal length of the… 1 mark · Numerical
- Q1(B)(vi) The image below shows a compound microscope. Which one of the two lenses $L_{1}$ or $L_{2}$ has a larger focal length? 1 mark · One word
- Q1(B)(vii) Radius of the first Bohr orbit of hydrogen atom is 0.05nm. Calculate the radius of the third orbit. 1 mark · Numerical
- Q2(i) Four-point charges $Q_{1}=+17\cdot7\mu C,$ $Q_{2}=-8\cdot85\mu C,$ $Q_{3}=-17\cdot7\mu C$ and $Q_{4}=35\cdot4\mu C$ are kept as… 2 marks · Numerical
- Q2(ii) (a) Find the value of current 'I' in Figure 2 given below. (b) State the conservation principle on which your calculation is… 2 marks · Short answer
- Q3 You are provided with three identical capacitors, each of capacitance 'C'. If $C_{p}$ is equivalent capacitance when they are… 2 marks · Numerical
- Q4(i) What is the effect of doubling the current flowing through a metallic wire on: drift speed of free electrons? relaxation time of… 2 marks · Short answer
- Q4(ii) Draw a labelled circuit diagram of a potentiometer used to compare emfs of two given cells X and Y. (Procedure and formula are… 2 marks · Drawing
- Q5 (i) Write an expression of Biot-Savart law in vector form. (ii) State Ampere's circuital law. Write an expression of Biot-Savart… 2 marks · Short answer
- Q6 A bi-convex lens of focal length $f_{1}$ is placed in air as shown in Figure 3(a) below. The radii of curvature of its first and… 2 marks · Numerical
- Q7 (i) Name the electromagnetic wave that scans the contents of the luggage of a traveller during a security check. (ii) Which… 2 marks · Short answer
- Q8 The work functions for metals $M_{1}$ and $M_{2}$ are 1.9eV and 5.0eV respectively. Perform necessary calculations to find out… 2 marks · Numerical
- Q9 Show that the intensity of electric field at a point in end on position i.e., axial position of an electric dipole is given by… 3 marks · Derivation
- Q10(i) In the circuit shown in Figure 4 below, how much resistance should be connected to a $10\Omega$ resistor so that the points M and… 3 marks · Numerical
- Q10(ii) Figure 5 below shows a battery consisting of three cells. Their emfs and internal resistances are also shown. Calculate: emf of… 3 marks · Numerical
- Q11(i) Obtain an expression for magnetic field (B) at the centre of a circular coil having 'n' turns of radius 'R' when it is carrying a… 3 marks · Derivation
- Q11(ii) Two moving coil galvanometers $G_{1}$ and $G_{2}$ are identical except for the following features: Two moving coil galvanometers… 3 marks · Short answer
- Q12 Figure 6 below shows a long straight conductor X carrying a current $I_{1}$. A point P is at a perpendicular distance '$r_{1}$'… 3 marks · Short answer
- Q13 A monochromatic ray of light incident on one refracting surface of an equilateral prism, suffers a deviation as shown in the… 3 marks · Short answer
- Q14 Draw a labelled diagram of an astronomical telescope when its final image lies at infinity. 3 marks · Drawing
- Q15 Kabir and Neha conducted experiments on light as part of their school project. Both of them worked with the same source of… 3 marks · Short answer
- Q16 Using Huygen's wave theory and a labelled diagram, show that angle of reflection (r) is equal to angle of incidence (i). 3 marks · Derivation
- Q17 (i) The graphs below show variation of stopping potential versus frequency of incident radiation for metals A and B. The graphs… 3 marks · Short answer
- Q18(i) When a coil is connected to a 200V dc supply, the current flowing through it is found to be 1A. However, when it is connected to… 5 marks · Long answer
- Q18(ii) Answer the following questions: A $70\Omega$ resistor is connected to an ac source generating an emf 'e' given by… 5 marks · Long answer
- Q19(i) Answer either subparts (i) to (iii) or (iv) to (vii). Draw a labelled graph showing the variation of binding energy per nucleon… 5 marks · Long answer
- Q19(ii) Answer the following questions: Calculate the minimum amount of energy which a gamma ray photon should possess in order to… 5 marks · Long answer
- Q20 Annie, a student of Physics, began her experiment by fabricating a p-n junction diode from an extrinsic semiconductor crystal… 5 marks · Case based