Physics 2019 Solved Question Paper ICSE Previous Year for practice so that student of class 10th ICSE can achieve their goals in next exam of council. Sample paper for physics also given . Hence by better practice and Solved Question Paper of Previous Year including 2019 is very helpful for ICSE student. By the practice of Physics 2019 Solved Question Paper ICSE Previous Year you can get the idea of solving. Try Also other year except Physics 2019 Solved Question Paper ICSE Previous Year for practice. Because only Physics 2019 Solved Question Paper ICSE Previous Year is not enough for preparation of council exam.

Physics 2019 Solved Question Paper ICSE Previous Year

Answers to this Paper must he written on the paper provided separately.

• You will not be allowed to write during the first 15 minutes.
• This time is to he spent in reading the question paper.
• The time given at the head of this Paper is the time allowed for writing the answers.
• Section I is compulsory. Attempt any four questions from Section II.
• The intended marks for questions or parts of questions are given in brackets [ ].

Physics 2019 Solved Question Paper ICSE Previous Year

Section – A [40 Marks]
(Attempt all questions from this Section)

Question 1.

(a) The diagram below shows a claw hammer used to remove a nail:

(i) To which class of lever does it belong ?
(ii) Give one more example of the same class of lever mentioned by you in (i) for which the mechanical advantage is greater than one.
(b) Two bodies A and B have masses in the ratio 5:1 and their kinetic energies are in the ratio 125:9. Find the ratio of their velocities. [2]
(c) (i) Name the physical quantity which is measured in calories
(ii) How is calorie related to the SI unit of that quantity? [2]
(d) (i) Define couple.
(ii) State the SI unit of moment of couple. [2]
(e) (i) Define critical angle.
(ii) State one important factor which affects the critical angle of a given medium. [2]

(a) (i) Class One.
(ii) Shears used for cutting the thin metal sheet

(b) Given

Kinetic energy is given by K = $\frac { 1 }{ 2 }$ mv2
Therefore,

(c) (i) Heat energy.
(ii) 1 cal = 4.2 J.

(d) (i) It is defined as a set of two equal and opposite forces acting along different lines
of action.
(ii) SI unit is N m.

(e) (i) It is the angle of incidence in the denser medium for which angle of refraction in the rarer medium is 90°.
(ii) Nature of the two media in contact.

Question 2.

(a) An electromagnetic radiation is used for photography in fog.
(ii) Why is this radiation mentioned by you, ideal for this purpose? [2]
(b) (b) (i) What is the relation between the refractive index of water with respect to air (aμw) and the refractive index of air with respect to water (wμa)
(ii) If the refractive index of water ivith respect to air (aμw) is $\frac { 5 }{ 3 }$. Calculate the refractive index of air ivith respect to water (wμa[2]
(c) The specific heat capacity of a substance A is 3,800 J kg-1K-1 and that of a substance B is 400 J Kg-1K-1. Which of the two substances is a good conductor of heat? Give a reason for your answer. [2]
(d) A man playing a flute is able to produce notes of different frequencies. If he closes the holes near his mouth, will the pitch of the note produced, increase or decrease? Give a reason. [2]
(e) The diagram below shows a light source P embedded in a rectangular glass block ABCD of
critical angle 42°. Complete the path of the ray PQ till it emerges out of the block. [Write necessary angles.] [2]

(ii) Because it can penetrate fog.

(b)
(ii) Given (aμw) = $\frac { 5 }{ 3 }$

Therefore, We have

(c) Substance B. Because it requires relatively Httle heat to raise its temperature.

(d) The pitch will decrease, as the pitch is inversely proportional to the length of the vibrating air column.

(e) The path of ray is as shown:

Question 3.

(a) (i) If the lens is placed in water instead of air, how does its focal length change?
(ii) Which lens, thick or thin has greater focal length? [2]
(b) Two waves of the same pitch have amplitudes in the ratio 1 : 3.
What will be the ratio of their:
(i) intensities and
(ii) frequencies? [2]
(c) How does an increase in the temperature affect the specific resistance of a :
(i) Metal and
(ii) Semiconductor? [2]
(d) (i) Define resonant vibrations.
(ii) Which characteristic of sound, makes it possible to recognize a person by his voice without seeing him ? [2]
(e) Is it possible for a hydrogen (11H) nucleus to emit an alpha particle? Give a reason for your

(a) (i) Its focal length increases.
(ii) Thin lens.

(b) (i) Ratio of intensities will be 1: 9.

(ii) Ratio of frequencies will be 1:1.

(c) (i) Increases.
(ii) Decreases.

(d) (i) If a body is made to vibrate with its fundamental frequency by an external source, then the vibrations are called resonant vibrations.
(ii) Quality.

(e) No, as it does not possess a helium nucleus.

Question 4.

(a) Calculate the effective resistance across AB :

(b) (i) State whether the specific heat capacity of a substance remains the same when its state changes from solid to liquid.
(c) A magnet kept at the centre of two coils A and B is moved to and fro as shouni in the diagram. The two galvanometers show deflection.

State with a reason whether :
x > y or x <y [x and y are magnitudes of deflection] [2]
(d) (i) Why is a nuclear fusion reaction called a thermo nuclear reaction?
(ii) Complete the reaction : [2]
3 He2 + 2H1→ 4He2 +…….+Energy
(e) State two ways to increase the speed of rotation of a DC motor. [2]

(a) Resistors of 5 Ω and 4 Ω are in series, therefore, their net resistance is Rs = 5 + 4 = 9 Ω.
Now, this 9 Cl and 3 Ω are in parallel, hence net resistance RP = $\frac{9 \times 3}{9+3}$ = $\frac { 18 }{ 12 }$ = 1.5 Ω.
Now, this is in series with the 8 Cl resistor, hence net resistance of the circuit is RT = 8 + 1.5 = 9. 5

(b) (i) No, specific heat capacity does not remain the same when it changes from solid to liquid.
(ii) Let us take the example of water.
Specific heat capacity of water = 4.2 J kg-1 K-1
and specific heat capacity of ice = 2.1 J kg-1K-1

(c) x < y. This is because coil B has more number of turns.

(d) (i) Because this occurs at a very high temperature.
(ii) 3He2 + 2H1 → 4He2 + 1H1 + Energy

Read Next 👇 Click on Page Number Given Below 👇