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Class 3 Exam  >  Class 3 Tests  >  Olympiad Test Level 2: Light, Sound and Force - Class 3 MCQ

Olympiad Test Level 2: Light, Sound and Force - Class 3 MCQ


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15 Questions MCQ Test - Olympiad Test Level 2: Light, Sound and Force

Olympiad Test Level 2: Light, Sound and Force for Class 3 2024 is part of Class 3 preparation. The Olympiad Test Level 2: Light, Sound and Force questions and answers have been prepared according to the Class 3 exam syllabus.The Olympiad Test Level 2: Light, Sound and Force MCQs are made for Class 3 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Olympiad Test Level 2: Light, Sound and Force below.
Solutions of Olympiad Test Level 2: Light, Sound and Force questions in English are available as part of our course for Class 3 & Olympiad Test Level 2: Light, Sound and Force solutions in Hindi for Class 3 course. Download more important topics, notes, lectures and mock test series for Class 3 Exam by signing up for free. Attempt Olympiad Test Level 2: Light, Sound and Force | 15 questions in 30 minutes | Mock test for Class 3 preparation | Free important questions MCQ to study for Class 3 Exam | Download free PDF with solutions
Olympiad Test Level 2: Light, Sound and Force - Question 1
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Identify P, Q, R

Detailed Solution for Olympiad Test Level 2: Light, Sound and Force - Question 1

Muscular force is applied by Magnet.

Magnetic Magnet is applied by Magnet.

Friction stops the movement of the moving body.

Olympiad Test Level 2: Light, Sound and Force - Question 2
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Choose the correct option

(i) An opaque object stops the light completely.
(ii) Firefly is a non-luminous object.
(iii) Sun is the main source of natural light.
(iv) Shadows do not provide information about shapes of objects.

Detailed Solution for Olympiad Test Level 2: Light, Sound and Force - Question 2

The correct statements are:

(i) True. Friction is the force that opposes motion between two surfaces that are in contact with each other.

(ii) False. Gravitational force is the force that pulls everything toward the center of the Earth.

(iii) True. The Sun is the main source of natural light on Earth. It is a massive ball of fire, at the center of which nuclear fusion produces massive energy. This energy comes out as heat and light.

(iv) False. Shadows provide information about the shapes of objects. A shadow is a dark outline or image cast by an object that blocks light. It is formed when light hits an opaque object that does not let the light pass through. Everywhere else around the opaque object, the light continues in a straight path until it bounces off the ground or wall behind the object.

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Olympiad Test Level 2: Light, Sound and Force - Question 3
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Select the requirements to form a shadow

Detailed Solution for Olympiad Test Level 2: Light, Sound and Force - Question 3
Formation of shadow requires three things-

(i) Source of light

(ii) Screen

(iii) An opaque object

Olympiad Test Level 2: Light, Sound and Force - Question 4
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In winters, you must have observed that people rub their hands together to generate heat in their hands. How does heat generate?
Detailed Solution for Olympiad Test Level 2: Light, Sound and Force - Question 4
Rubbing both the hands produces friction against movement of hands which generates heat energy
Olympiad Test Level 2: Light, Sound and Force - Question 5
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Two boys M and N are applying force on a block. If the block moves towards the boy M, which one of the following statements is correct?
Detailed Solution for Olympiad Test Level 2: Light, Sound and Force - Question 5
Magnitude of a force applied by M is smaller than that of N.
Olympiad Test Level 2: Light, Sound and Force - Question 6
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Tanu wants to push her cart up the plank. Which of the following planks will be easier for her to push the cart up?
Detailed Solution for Olympiad Test Level 2: Light, Sound and Force - Question 6
The more the height of the ramp, the more is the effort required to roll up or push the cart up the plank. Tanu will push the cart easily on ramp B, due to less height.
Olympiad Test Level 2: Light, Sound and Force - Question 7
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What does light help us do?
Detailed Solution for Olympiad Test Level 2: Light, Sound and Force - Question 7

Light helps us to remove darkness and see the objects around us.

Olympiad Test Level 2: Light, Sound and Force - Question 8
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Q cannot hear the sound produced by P when the medium between them is ________.
Detailed Solution for Olympiad Test Level 2: Light, Sound and Force - Question 8
Sound cannot travel through vacuum. It always require a medium to travel
Olympiad Test Level 2: Light, Sound and Force - Question 9
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Sahil shone a torch and blew a horn at the same time, while standing at 15m distance from Amit. Amit will _______.
Detailed Solution for Olympiad Test Level 2: Light, Sound and Force - Question 9

Sound waves travel slower than light waves thus, Amit will first see the light and then hear the sound.

Olympiad Test Level 2: Light, Sound and Force - Question 10
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A force can be either a push or pull. Which of the following classifications has been described INCORRECTLY?
Detailed Solution for Olympiad Test Level 2: Light, Sound and Force - Question 10

Wristband is pulled that changes it's shape.

Olympiad Test Level 2: Light, Sound and Force - Question 11
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Which of the following statements is incorrect?
Detailed Solution for Olympiad Test Level 2: Light, Sound and Force - Question 11

The shape of an object determines the shape of its shadow. However, the size of the shadow can change. These changes are caused by the change in position of the light source.

Olympiad Test Level 2: Light, Sound and Force - Question 12
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Select the odd one out on the basis of the type of mechanical force involved.
Detailed Solution for Olympiad Test Level 2: Light, Sound and Force - Question 12
Hitting the cricket ball with a bat to make a run shows pushing action while rest three show pulling action.
Olympiad Test Level 2: Light, Sound and Force - Question 13
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Some objects are given in the box.

There are _______ luminous and ________ non-luminous objects in the given box.
Detailed Solution for Olympiad Test Level 2: Light, Sound and Force - Question 13
There are 4 luminous (sun, candle, Torch, Diya) and 2 non-luminous (Bed and chair) in the given box.
Olympiad Test Level 2: Light, Sound and Force - Question 14
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Study the given setups and select The option which shows the correct shadows formed on screen in each setup.
Detailed Solution for Olympiad Test Level 2: Light, Sound and Force - Question 14
Aditya shows the right path that light travels in a straight line.
Olympiad Test Level 2: Light, Sound and Force - Question 15
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Which of these actions requires both push and pull forces?
Detailed Solution for Olympiad Test Level 2: Light, Sound and Force - Question 15
Cutting a wood with a wood cutter shows both push And pull forces.
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