# Sample Paper ICSE Class 10 Physics Set B

Students can refer to the following Sample Paper ICSE Class 10 Physics Set B with Answers provided below based on the latest syllabus and examination guidelines issued for ICSE Physics. All specimen papers have been prepared covering all chapters given in ICSE Physics book for Class 10. You should also refer to ICSE Class 10 Physics Solutions.

Sample Paper ICSE Class 10 Physics Set B with Answers

Class X

SECTION-A
[All questions are compulsory in this section]

Q.1 (a) Define moment of force and state its S.I unit. [5 x 2 = 10]
(b) What is the position of centre of gravity of a:- (i) Circular Disc (ii) Cylinder
(c) A coolie ‘X’ carrying a load on his head climbs up a slope and another coolie ‘Y’ carrying the identical load on his head moves the same distance on a frictionless horizontal platform. Who does more work and why?
(d) A spring is kept compressed by a toy cart of mass 200g. On releasing the cart, it moves with a speed of 0.4m/s. Calculate the potential energy of the spring.
(e) Give two reasons why the efficiency of a single movable pulley is not 100%.

Q.2 (a) Name two factors on which the refractive index of a medium depends. [5 x 2 = 10]
(b) The power of a lens is -2.0 D. Find its focal length and its kind.
(c) State any two uses of a convex lens.
(d) Name four colours of the spectrum of white light which have wavelength longer than blue light.
(e) A man is standing at a distance of 12 m from a cliff. Will he be able to hear a clear echo of his sound? Give a reason for your answer.

Q.3 (a) What is meant by noise pollution? Name one source of sound causing noise [5 x 2 = 10]
pollution.
(b) Name and state the law which relates the potential difference and current in a conductor. What is the necessary condition for a conductor to obey the law named above by you?
(c) Four resistors each of resistance 5 Ώ are connected in parallel. What is the effective resistance?
(d) At what (i) Voltage and (ii) Frequency is the alternating current supplied to our houses?
(e) An electric kettle is rated 3 kW, 250 V. Give reason whether this kettle can be used in a circuit which contains a fuse of current rating 13 A.

Q.4 (a) Calculate the amount of heat energy required to raise the temperature of [5 x 2 = 10]
200 g of copper from 20oC to 80oC. Specific heat capacity of copper= 390 J/kg K
(b) State the effect of presence of impurity on the melting point of ice. Give one use of it.
(d) A given wire of resistance 2 Ώ is stretched to double its length. What will be its new resistance?
(e) How is it possible to detect the filling of a bottle under a water tap by hearing the sound at a distance?

SECTION-B
[Attempt any four questions from this section]

Q.5 (a) A pulley system has a velocity ratio 3 and an efficiency of 80%. Draw a labelled diagram of this pulley system. Calculate:- 
(i) The mechanical advantage of the system.
(ii) The effort required to raise a load of 300 N.

(b) The diagrams (1) and (2) given below show the refraction of a ray of light of single colour through a prism and a parallel sided glass slab respectively.

(i) Label the incident, refracted, emergent rays and the angle of deviation in the diagrams.
(ii) In what way the direction of emergent ray in the two cases differ with respect to the incident ray? Give a reason for your answer.

(c) Light of a single colour is passed through a liquid having a piece of glass suspended  in it. On changing the temperature of liquid, at a particular temperature the glass piece is not seen.
(i) When is the glass piece not seen?
(ii) Why is the light of single colour used?

Q.6 (a) The diagram given below shows the uniform metre rule placed on a fulcrum at its  mid-point O and having a weight 40 gf at the 10 cm mark and a weight of 20 gf at the 90cm mark.
(i) Is the metre rule in equilibrium? If not, how will the rule turn?
(ii) How can the rule be brought in equilibrium by using an additional weight of 40 gf?

(b) The diagram below shows two tuning forks A and B of the same frequency mounted  on two separate sound boxes with their open ends facing each other. The fork A is set into vibration.
(ii) State the principle illustrated by this experiment.

(c) (i) What is the colour code for the insulation on live, neutral and earth wire? 
(ii) It is dangerous to connect the switch in the neutral wire. Give a reason for your answer.

Q.7 (a) A piece of ice is heated at a constant rate. The variation in temperature with time  of heating is shown in the graph given below:
(i) What is represented by the part C D?
(ii) What does the part A B represent?
(iii) What conclusion do you draw regarding the nature of ice from the graph?

(b) Complete the following nuclear changes:-

(c) In the circuit shown below, calculate the equivalent resistance between the points  A and B.

Q.8 (a) The diagram below shows an object AB and a converging lens L with foci F1 and F2. 
(i) Complete the diagram to form the image of the object AB.
(ii) State three characteristics of the image formed.

(b) A pendulum has a frequency of 5 vibrations per second. An observer starts the pendulum and fires a gun simultaneously. He hears echo from the cliff after 8 vibrations of the pendulum. If the velocity of sound in air is 340 m/s, find the distance between the cliff and the observer.

(c) Show that the sum of kinetic energy and potential energy (i.e., total mechanical energy) is always conserved in the case of a freely falling body under gravity from a height h by finding it when:- 
(i) the body is at the top.
(ii) the body has fallen a distance ‘x’.
(iii) the body has reached the ground.

Q.9 (a) A uniform circular motion is an accelerated motion. Explain it. State whether the acceleration is uniform or variable? Name the force responsible to cause this acceleration. What is the direction of force at any instant? Draw a diagram in support of your answer.
(b) What do you mean by background radiations? Name its two sources. 
(c) In the diagram given below, a ray of light PQ is incident normally on the hypotenuse of an isosceles right angled prism ABC. 
(i) Complete the path of the ray PQ till it emerges from the prism. Mark in the diagram the angle wherever necessary.
(ii) What is the angle of deviation of the ray PQ?
(iii) Name a device in which this action is used.