ICSE Physics Answer Key 2025 (Available): Question Paper Analysis, Unofficial Key

ICSE Physics Answer Key 2025 is here for the students to cross-check their responses. Students can also go through the question paper analysis below.

Abhilasha Kiran

Updated on -Mar 17, 2025 | 02:02 PM IST

ICSE Physics Answer Key 2025 is provided here (Image Credits: pexels.com).

ICSE Physics Answer Key 2025: The Council for the Indian School Certificate Examinations (CICSE) successfully held the ICSE Physics Exam today, March 17, 2025, from 11 AM to 2 PM. Students can cross-check their written responses with the ICSE Physics Answer Key 2025 provided below. It is the unofficial answer key prepared by the subject experts. Students can use it to calculate their probable scores. The exam was conducted for 80 marks, and students can also go through the detailed questions paper analysis to evaluate their overall performance by going through the overall and section-wise difficulty levels.

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ICSE Physics Answer Key 2025

Students can cross-check their responses with the ICSE Physics Unofficial Answer Key 2025 here.

Questions

Answers

Ques 1 (i): A body is acted upon by two equal and opposite forces, that are NOT along the same straight line. The body will:

(b) have only rotational motion

Ques 1 (ii): Which among the following is a vector quantity?

(d) moment of couple

Ques 1 (iii): What is the correct energy transformation during burning of a candle?

Ques 1 (iv): When a ray of light passes from one optical medium to another, which of the following physical quantities does NOT change?

(b) Frequency of the wave

Ques 1 (v): Which one of the following combinations is the correct ascending order of electromagnetic waves in terms of wavelength?

(a) gamma-rays, visible light, microwaves

Ques 1 (vi): For a lever, a graph is plotted with load on Y-axis and effort on X-axis. Which load of the following represents the slope of the graph?

(a) Mechanical advantage

Ques 1 (vii): For a real image formed by a convex lens, the ratio of 1: 0 = 2 : 5, then the object is: (I is the height of the image and O is the height of the object)

(d) between 2 and 2F

Ques 1 (viii): A ray of light is incident normally on a face of an equilateral prism. The ray gets totally reflected at the second refracting surface. The total deviation produced in the path of the ray is:

Ques 1 (ix): In a closed circuit containing a bulb and a cell, the electromotive force (e) and the terminal voltage (V) is related as.(Given I is current and r is internal resistance.)

(b) v=e-tr

Ques 1 (x): A metal piece of mass 5 g has thermal capacity 2.5 JK''. If the mass of the metal is tripled, then its specific heat capacity will be:

(d) 0.5 jg^-1 K^-1

Ques 1 (xi): Assertion (A): As the level of water in a tall measuring cylinder kept under running tap rises, the pitch of sound gradually increases.
Reason (R): Frequency of sound is inversly proportional to the length of the water column.

Ques 1 (xii): In the given circuits Y and Z, the resistors, R, and R2, are connected in:

(b) parallel in both the circuits

Ques 1 (xiii): A radioactive element P emits one a-particle and transforms to a new element Q. What will be the position of the element Q in the periodie table?

(d) two groups to the left of P

Ques 1 (xiv): Each of the substances given below is supplied with same amount of heat. Which one will attain the highest temperature?

Substance	Lead	Aluminium	Copper	Iron
Specific heat capacity	0.031	0.21	0.095	0.115

(d) lead

Ques 1 (xv): The following figure shows a small bar magnet falling freely through a copper ring. For the observer at A, the direction of the induced current will be:

(b) anticlockwise when magnet is above and below the ring

Ques 2 (i) (a): In uniform circular motion the centrifugal force acts.....

towards the centre

Ques 2 (i) (b): Refractive index of a medium is independent of........

angle of incidence

Ques 2 (i) (c): Heat absorbed during change of phase depends on.....

mass

Ques 2 (i) (d): Emf of a cell is------ the terminal voltage when the cell is in open circuit.

equal to

Ques 2 (i) (e): In a step-up transformer the turns ratio is.......

more than 1

Ques 2 (i) (f): The nuclear radiation with lowest ionizing power is....

ICSE Physics Question Paper Analysis, Unofficial Key

The ICSE Physics Question Paper was divided into two sections A and B with short answer and choice-based long answer questions. While all questions were necessary to attempt, students were given internal choices.

Particulars	Details
Overall Difficulty Level	Moderate
Section A Difficulty Level	Esy to Moderate
Section B Difficulty Level	Moderate
Number of good attempts	60+
Was the paper lengthy?	Students found section B lengthy

While students can use the ICSE Physics Answer Key 2025 and Question Paper Analysis for evaluating their performance, students must note that it is unofficial and students can only use it as a reference.

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ICSE Physics Answer Key 2025

ICSE Physics Question Paper Analysis, Unofficial Key

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