ISC Class 12 Physics Specimen Paper 2026-27: Download PDF for CISCE Board Exam

Category

Details

Conducting Body

Council for the Indian School Certificate Examinations (CISCE)

Exam Name

ISC Class 12 Physics

Academic Session

2026–27

Exam Date

To be announced 

Paper Type

Theory

Total Marks

70 Marks (Practicals: 30 Marks)

Exam Duration 

3 Hours

Official Website

cisce.org

Question 1

(A) In questions (i) to (vii), choose the correct alternative (a), (b), (c) or (d) for each of the questions given below.
(i) A point charge −Q and three points A, B and C are shown in Figure 1 below.

If V is electric potential and E is electric field intensity, we can infer that:
(a) E_A > E_B > E_C
(b) E_A < E_B < E_C
(c) V_A < V_C < V_B
(d) V_A > V_C > V_B

(ii) Select the odd one out from the following options.
(a) Iron
(b) Nickel
(c) Cobalt
(d) Platinum

(iii) In Figure 2 below, CD is an infinitely long and straight metallic wire carrying a current I. Point P is at a perpendicular distance 𝑟 from it.

Which combination of I and r gives maximum magnetic field at point P, pointing into the plane of the paper?
(a) I = 4A towards C, with r = 0·500 m
(b) I = 4A towards D, with r = 0·250 m
(c) I = 8A towards C, with r = 0·125 m
(d) I = 8A towards C, with r = 0·050 m

(iv) Match the entriesin Column I with those in Column II.

(a) 1-C, 2-D, 3-A, 4-B
(b) 1-B, 2-D, 3-C, 4-A
(c) 1-C, 2-A, 3-B, 4-D
(d) 1-A, 2-B, 3-D, 4-C

(v) Identify the phenomena that occur when a P-N junction diode is forward biased. 
(P) The width of the depletion layer decreases.
(Q) The height of the potential barrier is lowered.
(R) The effective resistance of the diode increases significantly.
(S) The reverse current flows mainly due to the diffusion of majority
charge carriers.
(a) Both (P) and (Q)
(b) Both (R) and (S)
(c) Both (P) and (S)
(d) Both (Q) and (R)

(vi) In an astronomical telescope of refracting type,
(a) Objective lens has smaller focal length, and eyepiece lens has greater focal length.
(b) Objective lens has greater focal length, and eyepiece lens has smaller focal length.
(c) Both objective lens and eyepiece lens have large focal length.
(d) Both objective lens and eyepiece lens have small focal length.

(vii) Given below are two statements marked, Assertion and Reason. Read the two statements and choose the correct option.
Assertion: The focal length of a convex mirror will increase, if the mirror is placed in water.
Reason: The focal length of a convex mirror is equal to half its radius of curvature. 
(a) Both Assertion and Reason are true, and Reason is the correct explanation for Assertion.
(b) Both Assertion and Reason are true, but Reason is not the correct explanation for Assertion.
(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.

(B) Answer the following questions briefly:

(i) Two point charges Q1 and Q2, separated by a distance, are such that there is no neutral point (where electric field is zero) in their vicinity. What is the relation between Q1 and Q2?
(ii) Compare resistance of an ideal voltmeter with that of an ideal ammeter.
(iii) How can the focal length of a given convex lens be measured in Physics laboratory using only a metre scale?
(iv) What is the difference between a moving metallic ball colliding with another ball in motion and a photon colliding with an electron?
(v) When can a gamma ray photon produce a proton and an antiproton pair?
(vi) Explain why resistance of a semiconductor material decreases when its temperature is increased.
(vii) Fill in the blank with an appropriate term from the bracket.
When a light wave travels from one medium to another, its ________ (amplitude, wavelength, frequency, speed) remains unaltered.

SECTION B – 14 MARKS

Question 2

(i) A negatively charged thundercloud above the earth’s surface may be perceived as a parallel plate capacitor. (Refer to the image below.) The lower plate of the capacitor is the Earth’s surface, and the upper plate is the base of the thundercloud. The area of the base of the thundercloud = 4·5 × 108m2 , distance of thundercloud base from the earth’s surface = 4425m. Calculate the capacitance of this capacitor.

OR

(ii) A tiny bird carrying a charge of q = 8 × 10-17C dives vertically down towards a large positively charged metallic plate kept on a table in a horizontal position. What should be the surface charge density (σ) of the plate so that the bird stops in its flight, close to the plate? (Mass of the bird = 50g)

Question 3

Draw a labelled diagram of an arrangement used in Physics laboratory to compare emfs of two given cells X and Y.

Question 4 

(i) According to Ohm’s law, V = IR, so if potential difference (V) between the two ends of a conductor is varied, will its resistance (R) change? Explain your answer in brief. (Understand)

OR

(ii) Heating power developed in a resistor R is given by P = 𝑉²/𝑅. It implies that power P ∝1/𝑅 i.e., power varies inversely with R. Heating power developed in a resistor R is also given by P = I²R. It implies that power P ∝ 𝑅 i.e., power varies directly with R. Under what conditions, are the above-mentioned statements valid?

Question 5

Explain why a blue coloured spark appears in a switch contact when a circuit containing a load like a heater, geyser or an electric iron is switched off.

Question 6

There are seven types of electromagnetic waves having different frequency ranges. Arrange them in the increasing order of their frequencies.

Question 7

(i) Why the current flowing is extremely small during reverse biasing of a junction diode?

(ii) Extrinsic semiconductors are neither good nor bad conductors of electricity. Why are they still considered useful?

Question 8

Two particles A and B of masses mA and mB have de Broglie wavelength 𝜆𝐴 and 𝜆𝐵. If 𝜆_𝐴 = 2 𝜆_𝐵, compare their kinetic energies.

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To download complete Question Paper PDF along with marking scheme for ICSE Class 10 physics Specimen Paper 2027 for board exams. Students can tap on the link below and get the PDF for free to download and start their prepration in advance to score good grades in 2027 board exams. 

DOWNLOAD: ISC Class 12 Physics Specimen Paper 2027 PDF