ISC Class 12 Physics Paper 1 2026 Exam: Practise Sample Paper by Experts for Last Minute Revision

As the exam for ISC Class 12 Physics Paper 1 (Theory) is scheduled for tomorrow March 16, 2026, from 2:00 PM to 5:00 PM, students can practice for the paper by solving the sample questions by experts from here. The questions shared assess your ability to solve difficult concepts, such as electromagnetism, optics, and the subtleties of modern physics, along with formulas. By solving the questions you can improve your problem-solving, and learn time management.

Students can access sample questions along with a PDF that has been prepared by subject matter experts as per the most recent CISCE syllabus and exam format to assist you for last minute preparation.

ISC Class 12 Physics Paper 1 Exam 2026: Key Highlights

Given here are essential exam details for ISC Class 12 Physics Paper 1. Students can find details like exam date, time duration and other information from here. 

ISC Class 12 Physics Exam Pattern 2026 (Unit-Wise Weightage)

The shared information contains ISC Class 12 Physics Paper 1 exam paper pattern, along with unit-wise weightage  and marks distribution of the topics across the paper. Read it carefully to understand the pattern and prepare for the exam accordingly. 

Unit-Wise Chapter Weightage 

Exam Paper Pattern 2026

Internal and Practical Evaluation (30 Marks)

• Practical Examination (15 Marks

• Project Work (10 Marks)

• Maintaining the lab record (5 marks).

ISC Physics Sample Question Paper 2026 By Experts

SECTION A– 14 MARKS

(i) When a beam of white light is incident on a prism, the prism:

(a) only disperses the incident light.

(b) only deviates the incident light.

(c) deviates as well as disperses incident light.

(d) neither deviates nor disperses incident light

ii) Answer the following questions briefly:

(i) Current I flowing through a metallic wire is gradually increased. Show graphically how heating power (P) developed in it varies with the current (I). 

(ii) State one method to minimise flux loss in a transformer. 

(iii) Why are giant telescopes of reflecting type? Give any one scientific reason.

(iv) Give any one example where a ray of light travelling from one optical medium

to another travels undeviated.

iii) What happens when an electron collides with a positron? 

(vii) What is the direction of flow of electrons in a solar cell?

(v) The relative permeability of substance ‘X’ is slightly less than one and that of substance ‘Y’ is slightly more than one. Then: 

(a) ‘X’ is paramagnetic and ‘Y’ is ferromagnetic. 

(b) ‘X’ is diamagnetic and ‘Y’ is ferromagnetic. 

(c) ‘X’ is paramagnetic and ‘Y’ is diamagnetic. 

(d) ‘X’ is diamagnetic and ‘Y’ is paramagnetic

vi) N-type semiconductor is that which has: 

(a) majority of holes as charge carriers. 

(b) majority of free electrons as charge carriers. 

(c) trivalent element added as an impurity. 

(d) an equal number of holes and free electrons.

(vii) Assertion: When a convex lens made of glass is completely immersed in water, its focal length increases.

Reason: The refractive index of glass with respect to water is greater than that of glass with respect to air.

SECTION B – 14 MARKS

1. The current (I)-voltage (V) graphs for a conductor are given at two different

temperatures T1 and T2.

(a) At which temperature T1 or T2 is the resistance higher? 

(b) Which temperature T1 or T2 is higher?

2. Arrangement of an oxygen ion and two hydrogen ions in a water molecule is shown in Figure 4 below.

Calculate electric dipole moment of water molecule. Express your answer in terms of e (charge on hydrogen ion), l and θ.

3. Two moving coil galvanometers G1 and G2 are identical except that they have 50 turns

and 20 turns and resistance of 10Ω and 1Ω respectively. Perform necessary

calculations to check which one has greater voltage sensitivity.

4. Magnetic field at the centre of a circular coil is B. Calculate the magnetic field at the same point when each of the current, number of turns of the coil and its radius is doubled.

5. With reference to photoelectric effect, define the terms: 

(i) Threshold frequency. 

(ii) Work function

SECTION C – 27 MARKS

6. Obtain an expression for electric potential (V) at a point near a point charge ‘Q’

7. A galvanometer having a resistance of 20$\Omega$ shows a full scale deflection with a current of 1mA. How can it be converted into a voltmeter with a range of 0-10V?

8. In a hydrogen atom, an electron jumps from the first excited state to the ground state,

and a photon is emitted. This photon is incident on a metal surface having a work

function of 2eV. Calculate the stopping potential of the electron emitted from the

metal surface.

SECTION D – 15 MARKS

9. Draw a labelled diagram of a full wave rectifier. Show graphically how its output voltage varies with time.

Students can use these questions to prepare thoroughly for the upcoming exams and master the paper.

ISC Physics Sample Question Paper 2026 By Experts: Download PDF 

Check the link shared below to download ISC Physics sample question paper 2026 by experts that contains all question shared here.