ISC Physics 2026 Specimen Paper with Answers
All 39 questions of the ISC Physics 2026 Specimen Paper, in printed order. Open a question to read it in full and see its answer.
- Q1(A)(i) Two point charges $+50\text{ nC}$ and $-50\text{ nC}$ separated by a distance of $1\text{ mm}$ are kept well inside a large… 1 mark · MCQ
- Q1(A)(ii) Three straight, parallel wires are coplanar and perpendicular to the plane of the page. The currents $I_1$ and $I_3$ are directed… 1 mark · MCQ
- Q1(A)(iii) The variation of magnetic susceptibility ($\chi$) with absolute temperature ($T$) for a diamagnetic substance is: (Recall) 1 mark · MCQ
- Q1(A)(iv) The wavelength $\lambda_e$ of an electron and $\lambda_p$ of a photon of same energy E are related by: (Understanding) 1 mark · MCQ
- Q1(A)(v) In which of the following figures, is the p-n diode forward biased? (Recall) 1 mark · MCQ
- Q1(A)(vi) When a beam of white light is incident on a prism, the prism: (Understanding) 1 mark · MCQ
- Q1(A)(vii) The focal length of the convex mirror will increase, if the mirror is placed in water. Given below are two statements marked… 1 mark · Assertion-reason
- Q1(B)(i) Current I flowing through a metallic wire is gradually increased. Show graphically how heating power (P) developed in it varies… 1 mark · Drawing
- Q1(B)(ii) State one method to minimise flux loss in a transformer. (Recall) 1 mark · Short answer
- Q1(B)(iii) Why are giant telescopes of reflecting type? Give any one scientific reason. (Recall) 1 mark · Short answer
- Q1(B)(iv) Give any one example where a ray of light travelling from one optical medium to another travels undeviated. (Understanding) 1 mark · Short answer
- Q1(B)(v) Two charged particles having same charge but different masses, are passed through a potential difference V. When V is varied… 1 mark · Short answer
- Q1(B)(vi) What happens when an electron collides with a positron? (Recall) 1 mark · Short answer
- Q1(B)(vii) What is the direction of flow of electrons in a solar cell? (Recall) 1 mark · Short answer
- Q2(i) Find the capacitance of the following combinations between terminals A and B. Area of each plate is A and separation between… 2 marks · Short answer
- Q2(ii) The current (I)-voltage (V) graphs for a conductor are given at two different temperatures $T_1$ and $T_2$. (Analysis) At which… 2 marks · Short answer
- Q3 Arrangement of an oxygen ion and two hydrogen ions in a water molecule is shown in Figure 4 below. Calculate electric dipole… 2 marks · Numerical
- Q4(i) Two cells of same emf E, but different internal resistance $r_1$ and $r_2$ are connected to an external resistance R as shown in… 2 marks · Numerical
- Q4(ii) Ramesh performed an experiment to determine an unknown resistance R using the circuit shown in Figure 6 below. X is a resistance… 2 marks · Short answer
- Q5 Two moving coil galvanometers $G_1$ and $G_2$ are identical except that they have 50 turns and 20 turns and resistance of… 2 marks · Numerical
- Q6 Two similar convex lenses are made up of two different materials as shown in Figures 7 and 8 below. Find the number of images… 2 marks · Short answer
- Q7 Name the electromagnetic wave used in: (Recall) radars crystallography 2 marks · Short answer
- Q8 In the photoelectric effect, the maximum kinetic energy of the emitted photoelectron is ‘a’ and the work function of the metal is… 2 marks · Numerical
- Q9 Obtain an expression for electric potential (V) at a point near a point charge ‘Q’. (Recall) 3 marks · Derivation
- Q10(i) Five identical charges $Q = 2\mu\text{C}$ are placed equidistant on a semicircle as shown in Figure 9. Another point charge… 3 marks · Numerical
- Q10(ii) Using Kirchhoff’s laws of electrical networks, calculate the current $I_3$. (Application) 3 marks · Numerical
- Q11 Using Ampere circuital law, obtain an expression for magnetic field ‘B’ at a point at a perpendicular distance ‘r’ from a long… 3 marks · Derivation
- Q12(i) A student records the following data for the magnitudes (B) of the magnetic field at axial points at different distances x (See… 3 marks · Short answer
- Q12(ii) An electron moving along positive X axis with a velocity of $8 \times 10^7\text{ ms}^{-1}$ enters a region having uniform… 3 marks · Numerical
- Q13 Study the diagram shown in Figure 12 given below. Identify the following in Figure 12. (Understanding) A primary wavefront A… 3 marks · Short answer
- Q14 In Young’s double slit experiment, show that fringe width $\omega$ (fringe separation) is given by $\omega = \frac{\lambda D}{d}$… 3 marks · Derivation
- Q15 With reference to the lens maker’s formula, answer the following questions: (Understanding) Apply the formula (expression) of… 3 marks · Derivation
- Q16 Answer the following questions: A student studies details of a microorganism with the help of an instrument. Name the instrument… 3 marks · Drawing
- Q17 In a hydrogen atom, an electron jumps from the first excited state to the ground state, and a photon is emitted. This photon is… 3 marks · Numerical
- Q18(i) Answer the following questions: Define the co-efficient of self-inductance. (Recall) (1) Consider an A.C. source of frequency… 5 marks · Numerical
- Q18(ii) Three students, X, Y and Z performed an experiment for studying the variation of A.C. with frequency in a series LCR circuit and… 5 marks · Short answer
- Q19(i) Answer the following questions: Study the graph shown below and answer the questions that follow. (Recall) Indicate which region… 5 marks · Short answer
- Q19(ii) Answer the following questions: In an atom X, electrons absorb the energy from an external source. This energy “excites” the… 5 marks · Numerical
- Q20 A band gap is the distance between the valence band of electrons and the conduction band. Essentially, the band gap represents… 5 marks · Case based