Physics Specimen Paper 2023 Sec-B Solved for ICSE Class-10. Step by step solutions as council latest prescribe guideline of Model / Sample Question Paper.

During solutions of Physics Specimen Paper 2023 Sec-B we explain with labelled Figure , Graph, Table, Chart whenever necessary so that student can achieve their goal in next upcoming exam of council. Visit official website CISCE for detail information about ICSE Board Class-10.

## ICSE Class-10 Physics Specimen Paper 2023 Sec-B Solved

 Board ICSE Class 10th (x) Subject Physics Topic Specimen Paper Solved Syllabus Revised Syllabus Session 2022-23 Sec-B Descriptive Type Max Marks 80

### Physics Specimen Paper 2023 Solved for ICSE Class-10 Section B

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ICSE 2023 EXAMINATION SPECIMEN QUESTION PAPER
PHYSICS (SCIENCE PAPER – 1)

Maximum Marks: 80

• Time allowed: Two hour
• Answers to this Paper must be written on the paper provided separately.
• You will not be allowed to write during first 15 minutes.
• This time is to be spent in reading the question paper.
• The time given at the head of this Paper is the time allowed for writing the answers.
• Section A is compulsory. Attempt any four questions from Section B.
• The intended marks for questions or parts of questions are given in brackets [ ].

### SECTION B

(Attempt any four questions.)

Solution of ICSE Class-10 Physics Specimen Paper 2023 Sec-B

Question 4:
(i) The diagram (not drawn to the scale) below shows the graphical relation between angle of deviation and angle of incidence, when light passes through a triangular prism of angle 62° of a certain glass material.

(a) State the angle of minimum deviation of this prism and the corresponding angle of incidence.

(b) Calculate the value of X.

(ii) Redraw and complete the path of the ray AB till it emerges out of the prism of critical angle 42°.

(iii)

The above diagram shows that an observer sees the image of an object O at I.

(a) Name and define the phenomenon responsible for seeing the image at a different position.

(b) State the effect on X when:

1. Y increases

2. Y decreases

#### Question 5:

(i) An object of height 20 cm is placed in front of a lens at a distance of 50 cm. Its virtual, diminished image is formed at a distance of 15 cm.

(a) Identify the type of the lens.
(b) Calculate the focal length of the lens.

(ii) The diagram below shows the extreme colours of a visible spectrum (X and Y).

(a) Identify the colours X and Y.

(b) Which colour has greater speed in vacuum?

(iii) The diagram below shows an object AB kept in front of the lens. The path of one ray coming from the object is shown.

(a) Name the lens L.

(b) Redraw and complete the ray diagram showing the formation of the image.

(c) In which optical instrument is this kind of image formed?

#### Question 6:

(i) The diagram below shows a block and tackle system:

(a) Copy and redraw the labelled diagram showing the correct connection of tackle, direction of the forces involved to obtain the maximum V.R. and convenient direction.

(b) Calculate the M.A. of this pulley system if its efficiency is 80%.

(ii) The adjacent diagram shows a wheel of diameter 40 cm fixed on a wall capable of rotating around its centre O. If the wheel rotates in an anticlockwise direction, then:

(a) Calculate the clockwise moment.

(b) State whether X = 100 gf or X < 100 gf or X > 100 ef.

(iii) A coconut of mass 450 g falls from the top of an 80 m high tree.

(a) Calculate the potential energy possessed by the coconut when it is at the top of the tree.

(b) Without calculation, state the kinetic energy with which it strikes the ground and state the principle involved to arrive at the answer in eg. = 10 ms-²

#### Question 7:

(i) A person standing in front of a cliff fires a gun and hears its echo after 3s. If the speed of sound in air is 336 ms-1.

(a) Calculate the distance of the person from the cliff.

(b) After moving a certain distance from the cliff he fires the gun again and this time the echo is heard 1.5 s later than the first. Calculate distance moved by the person.

(ii) (a) A radioactive nucleus X emits an alpha particle followed by two beta particles and forms nucleus Y. What is the general name of the elements X and Y?

(b) If the atomic number of Y is 80 then what is the atomic number of X?

(c) If the atomic mass number of Y is 189 then what is the atomic mass number of X?

(iii) A boy tunes a radio channel to a radio station 93.5 MHz.

(a) Name and define the scientific wave phenomenon involved in tuning the radio channel.

(b) Now, what is the frequency of the channel? Convert this frequency into S.I. unit.

#### Question 8:

(i) (a) What is the meaning of the statement ‘the power rating of an appliance is 60W, 220V.’?

(b) In which wire is the fuse connected in a circuit?

(c) State the function of main switch in an electric circuit.

(ii) (a) Copy and complete the following nuclear reaction.

(b) What will be the effect on the radiation emitted in the above reaction when it is allowed to pass through an electric field? [Be specific in your answer]

(iii) Observe the given circuit diagram and answer the questions that follow:

(a) Calculate the resistance of the circuit when the key K completes the circuit.

(b) Calculate the current through 3Ω resistance.

#### Question 9:

(i) A metal piece present at 120°C is quickly dropped in a calorimeter of mass 80 g containing 200 g of water at 30°C. The final temperature attained by the mixture is 40°C. Calculate the thermal capacity of the metal piece. [Specific heat capacity of water = 4.2 Jg-¹ °C-¹, Specific heat capacity of calorimeter = 0.4 jg-¹ °C-¹]

(ii) The diagram below shows a cooling curve for a substance:

(a) State the temperatures at which the substance condenses and solidifies respectively.

(b) The temperature range in which the substance is in liquid state.

(c) Why do we prefer ice to ice-cold water for cooling a drink?

(iii) The diagram below shows a magnet placed between two coils A and B. The magnet is moved along the axis towards coil B.

(a) State the polarities induced at the ends Q and R of the coil due to the motion of the magnet.

(b) Name the phenomenon due to which the current is induced in the coils.

(c) Name the law which helps to find the polarities at the ends Q and R.