Physics Semester-1 ICSE Specimen Paper Solved Class-10

Physics Semester-1 ICSE Specimen Paper Solved Class-10 for practice.  Step by step solutions of ICSE Class-10 specimen model sample paper .  During solutions of semester-1 Physics specimen paper we explain with figure , graph, table whenever necessary so that student can achieve their goal in next upcoming exam of council .

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Physics Semester-1 ICSE Specimen Paper Solved Class-10

Solved Class-10 for practice Set of Physics Semester-1 ICSE Specimen Paper 

Whole Figure see in Specimen Paper Semester-1

Question-1 

Solution :

Option  (3.) Speed of light changes when it enters from one optical medium to another of different optical density is correct

Explanation

Solution see in bottom

(b) When a light ray enters from a denser medium to a rarer medium

1. The light ray bends towards the normal.
2. Angle of incidence is less than angle of refraction.
3. Speed of light decreases.
4. Speed of light remains unchanged.

Solution :

Option  (2.) Angle of incidence is less than angle of refraction. is correct

Explanation

Solution see in bottom

(c) In the diagram shown below:

1. B is incident ray and C is refracted ray.
2. A is incident ray and B is refracted ray.
3. C is incident ray and B is refracted ray.
4. A is incident ray and C is refracted ray.

Solution :

Option  (4.) A is incident ray and C is refracted ray. is correct

Explanation

Solution see in bottom

(d) From the diagram shown below, identify the characteristics of the image that will be formed.

1. Real.
2. Diminished.
3. Formed within the focal length.
4. Virtual

Solution :

Option  (4.) Virtual is correct

Explanation

Solution see in bottom

(e) The wavelength of light in a medium A is 600 nm. The wave enters medium B of refractive index 1.5
Steps to find the wavelength of light in medium B are given below. Choose an option which has the correct sequence of steps, to find the wavelength.
(𝑖) 𝜆 = 1.5 × 600

(𝑖𝑖) 𝜆 = 600/1.5
(𝑖𝑖𝑖) 𝜆 = 400 𝑛𝑚
(𝑖𝑣) 𝜆 = 900 𝑛𝑚

(𝑣) 1.5 =𝜆/600

1. (i) then (iii)
2. (ii) then (iii)
3. (i) then (iv)
4. (ii), (i) then (iv)
5. (v) then (iv)

Solution :

Option  (2.) (ii) then (iii) is correct

Explanation

Solution see in bottom

(f) The diagram below shows an image formed at a distance 36 cm from the lens LL’ of focal length 12 cm. With respect to this answer the questions that follow.

(i) The position of the object on the left-hand side should be

1. between 12 cm to 30 cm from the lens.
2. beyond 24 cm from the lens.
3. between 12 cm to 24 cm from the lens.
4. within 12 cm from the lens.

Solution :

Option  (3.) between 12 cm to 24 cm from the lens.
 is correct

Explanation

Solution see in bottom

(ii) Power of this lens is

1. – 8.33 D
2. + 8.4 D
3. + 8.33 D
4. – 8.4 D

Solution :

Option  (3). + 8.33 D is correct

Explanation

Solution see in bottom

(iii) The object distance with sign convention is

1. – 18 cm
2. – 15 cm
3. – 9 cm
4. + 18 cm

Solution :

Option  (1). – 18 cm is correct

Explanation

Solution see in bottom

(iv) If the lens LL’ is replaced by another lens of same type but focal length 15 cm then for the same object distance

1. the size of the image decreases.
2. the size of the image increases.
3. the size of the image remains the same.
4. information is insufficient to conclude.

Solution :

Option  (2). the size of the image increases. is correct

Explanation

Solution see in bottom

Question 2  (Physics Semester-1 ICSE Specimen Paper )

(a) The usable form of mechanical energy is

1. Elastic potential energy

2. Kinetic energy
3. Gravitational potential energy
4. None of the given options.

Solution :

Option  (2.) Kinetic energy is correct

Explanation

Solution see in bottom

(b) One horsepower is equal to

1. 100 W
2. 735 W
3. 764 W
4. 746 W

Solution :

Option  (4.) 746 W is correct

Explanation

Solution see in bottom

(c) If A and B of the same mass can climb the third floor of the same building in 3 minutes and 5 minutes respectively, then the ratio of their powers of A is to B in an ideal situation is

1. 1:1
2. 3:5
3. The information is insufficient to form a conclusion.
4. 5:3

Solution :

Option  (4.) 5:3 is correct

Explanation

Solution see in bottom

(d) If the centre of gravity of a metre scale of mass 80 g lies at the 45 cm mark, then which one of the following diagrams will show the balanced position of the scale.

………………..

…………………

Solution :

Option  (3) is correct

Explanation

Solution see in bottom

(e) A body has kinetic energy 250 J. If the mass of the body is 5 kg, then choose its velocity and momentum from the following options.

1. 50 m/s
2. 50 kg.m/s
3. 20 kg.m/s
4. 15 m/s
5. 10 m/s
6. 100 kg.m/s

Solution :

Option  2. 50 kg.m/s and 5. 10 m/s is correct

Explanation

Solution see in bottom

(f) A girl at rest at gate of her society which is 3.2 m above the road comes down the slope AB on a cycle without paddling. [g = 10 N/kg]

(i) The mechanical energy possessed by the girl at B is
1. Vibrational kinetic energy.
2. Translational kinetic energy
3. Elastic potential energy.
4. Gravitational potential energy.

Solution :

Option  (4.) Gravitational potential energy. is correct

Explanation

Solution see in bottom

(ii) The velocity with which girl reaches point A is
1. 32 m/s
2. 10 m/s
3. 8 m/s
4. Insufficient information to calculate velocity.

Solution :

Option  (3.) 8 m/s is correct

Explanation

Solution see in bottom

(iii) If the mass of the girl is 40 kg then the kinetic energy of the girl at A is
[Assuming no loss of energy.]
1. 1280 J
2. 1600 J
3. 400 J
4. 3200J

Solution :

Option  (1). 1280 J is correct

Explanation

Solution see in bottom

(iv) The potential energy of the girl (of mass 40 kg) when she reaches the midpoint of the slope of AB
1. 800 J
2. 200 J
3. 1600 J
4. 640 J

Solution :

Option  (4.) 640 J is correct

Explanation

Solution see in bottom

Question 3  (Physics Semester-1 ICSE Specimen Paper )

(a) Mechanical advantage (M.A.), load(L), and effort(E) are related as

1. M.A. = L X E
2. M.A. = E/L
3. M.A. X E = L
4. M.A. X L = E

Solution :

Option  (3.) M.A. X E = L is correct

Explanation

Solution see in bottom

(b) Which one of the following statements is correct?

1. A machine is used to have more output energy as compared to input energy.
2. Mechanical advantage of a machine can never be greater than 1.
3. If a machine gives convenience of direction, then its mechanical advantage should be greater than 1.
4. For a given design of a machine, even if the mechanical advantage increases, the velocity ratio remains the same.

Solution :

Option  (4.) For a given design of a machine, even if the mechanical advantage increases, the velocity ratio remains the same. is correct

Explanation

Solution see in bottom

(c) If a block and tackle system with convenient direction has 3 movable pulleys, then its velocity ratio

1. is either 6 or 7
2. should be 6
3. should be 7
4. is 3

Solution :

Solution see in bottom

Explanation

Solution see in bottom

(d) Work done by a body moving on a circular track is zero at every instant because

1. displacement is zero.
2. displacement is perpendicular to the centripetal force.
3. there is no force acting.
4. reason is not mentioned in the other options.

Solution :

Option  (2.) displacement is perpendicular to the centripetal force. is correct

Explanation

Solution see in bottom

(e) Identify the conditions required to hear a clear and distinct echo by humans, in air

1. The reflecting surface should be rough.
2. The size of the reflecting surface should be smaller than the wavelength of sound.
3. Sound should not be reflected back within 0.1 s.
4. The incident sound should have frequency more than 25000 Hz.
5. The size of the reflecting surface should be larger than the wavelength of sound.

Solution :

Option  (3.) Sound should not be reflected back within 0.1 s. is correct

Explanation

Solution see in bottom

(f) A person standing in front of a vertical cliff fires a gun and hears its echo in 3 s. The speed of sound in air is 340 m/s

(I) Calculate distance at which the person is standing in front of the cliff? Steps are given to calculate the distance. Select the correct sequence of  the steps from the given options:

……………….

…………………

1. (ii) then (iv)
2. (iii) then (ii)
3. (i) then (iii)
4. (iii) then (i)
5. (i) then (iv)

Solution :

Option  (3). (i) then (iii) is correct

Explanation

Solution see in bottom

(II) If the speed of sound changes to 350 m/s then how much distance should the person move towards or away from the cliff in order to hear the echo in the same time. Steps are given to calculate the distance. Select the correct sequence of the steps from the given option.

1. (ii), (iii) then (v)
2. (iv) then (ii)
3. (iv) then (v)
4. (ii) then (iv)
5. (i), (iv) and (v)

Solution :

Option  4. (ii) then (iv) is correct

Explanation

Solution see in bottom

Question 4  (Physics Semester-1 ICSE Specimen Paper )

(a) Assuming all lenses shown below are of the same material, state which lens has the maximum power.

1. R
2. P
3. Q
4. S

Solution :

Option  (3.) Q is correct

Explanation

Solution see in bottom

(b) In an electric cell while in use, the change in energy is from:

1. Chemical to mechanical
2. Chemical to electrical
3. Electrical to mechanical
4. Electrical to chemical

Solution :

Option  (2.) Chemical to electrical is correct

Explanation

Solution see in bottom

(c) The diagram below shows a pendulum having a bob of mass 80 g. A and C are extreme positions and B is the mean position. The bob has velocity 5 m/s at position B. Assuming there is no loss of energy, select the correct statements from the options given below:
[g = 10 N/kg]

1. At point A the bob will have only kinetic energy.
2. The maximum potential energy gained by the bob will be 1000J.
3. The maximum height ‘h’ reached by the bob will be 125 cm.
4. At point D the bob will have maximum kinetic energy.
5. The maximum potential energy gained by the bob will be 1 J
6. At point B the energy possessed by the bob is 1000 J.

Solution :

Option  (3). The maximum height ‘h’ reached by the bob will be 125 cm. and (5). The maximum potential energy gained by the bob will be 1 J is correct

Explanation

Solution see in bottom

(d) Select correct options for Total internal reflection in a medium

1. Can take place in an optically denser medium as compared to an optically rarer medium.
2. Takes place for any angle of incidence greater than 42 degree.
3. This reflection does not obey the laws of reflection.
4. Can take place if the angle of incidence in a denser medium is more than the critical angle.

Solution :

Option  1. Can take place in an optically denser medium as compared to an optically rarer medium.
and 4. Can take place if the angle of incidence in a denser medium is more than the critical angle. is correct

Explanation

Solution see in bottom

(e) The diagram shows the path of light through a right-angled prism of critical angle 42°.
Observe the diagram and answer the questions that follow.

(i) The phenomenon at the surface AC is
1. Refraction
2. Partial reflection

3. Total internal reflection
4. Scattering.

Solution :

Option  (3). Total internal reflection is correct

Explanation

Solution see in bottom

(ii) The angle of incidence at the surface AC is
1. 30°
2. 45°
3. 0°
4. 60°
5. 90°

Solution :

Option  (4). 60° is correct

Explanation

Solution see in bottom

(iii) The angle of incidence at the surface AB is
1. 30°
2. 0°
3. 45°
4. 60°
5. 90°

Solution :

Option (1). 30° is correct

Explanation

Solution see in bottom

(iv) Which of the following statement is wrong?
1. Speed of light ray PQ is equal to the speed of light ray ST.
2. Speed of light ray QR is equal to the speed of light ray RS.
3. Speed of light ray PQ is greater than the speed of light ray RS.
4. Speed of light ray RQ is greater than the speed of light ray ST.

Solution :

Option  (4.) Speed of light ray RQ is greater than the speed of light ray ST.  is correct

Explanation

Solution see in bottom

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