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Class 3 Exam  >  Class 3 Tests  >  Science for Class 3  >  Test: Light, Sound and Force - 2 - Class 3 MCQ

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


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10 Questions MCQ Test Science for Class 3 - Test: Light, Sound and Force - 2

Test: Light, Sound and Force - 2 for Class 3 2024 is part of Science for Class 3 preparation. The Test: Light, Sound and Force - 2 questions and answers have been prepared according to the Class 3 exam syllabus.The Test: Light, Sound and Force - 2 MCQs are made for Class 3 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Light, Sound and Force - 2 below.
Solutions of Test: Light, Sound and Force - 2 questions in English are available as part of our Science for Class 3 for Class 3 & Test: Light, Sound and Force - 2 solutions in Hindi for Science for Class 3 course. Download more important topics, notes, lectures and mock test series for Class 3 Exam by signing up for free. Attempt Test: Light, Sound and Force - 2 | 10 questions in 15 minutes | Mock test for Class 3 preparation | Free important questions MCQ to study Science for Class 3 for Class 3 Exam | Download free PDF with solutions
Test: Light, Sound and Force - 2 - Question 1
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Roy wants to make a list of actions that show friction produces heat. Which of the following could he include in his list?
(a) Rubbing hands together
(b) Scratching a match stick against the box
(c) Sawing wood
(d) Drilling a hole into metal sheet
(e) Rubbing off some pencil marks with an eraser

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

As all these actions involve two surfaces rubbing against each other, thus force of friction comes into action which produces heat.

Test: Light, Sound and Force - 2 - Question 2
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Select the forces that the women X and Y in the diagram need to overcome to carry their groceries.

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

Woman 'X' needs to overcome friction to slide the trolley smoothly. Woman 'Y' needs to hold up the shopping bags against gravity, 

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Test: Light, Sound and Force - 2 - Question 3
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Nidhi was asked to draw the shadow of a tumbler formed on the screen behind it, when it is kept in different manners at the same position and light is shone on it from the same direction. She drew three shadows as shown here.

Read the following statements regarding it and select the INCORRECT ones.
(i) Shadow 1 is formed when the tumbler is kept horizontally.
(ii) Shadow 2 is formed when the tumbler is kept vertically upright.
(iii) Shadow 3 is incorrect because the given tumbler cannot cast a rectangular shadow.

Detailed Solution for Test: Light, Sound and Force - 2 - Question 3

A tumbler or any object may cast differently shaped shadows depending upon the angle of light source and the manner in which the object is kept.

Test: Light, Sound and Force - 2 - Question 4
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Q can hear the sound made by P in the shortest time, when the medium is a _______.
Detailed Solution for Test: Light, Sound and Force - 2 - Question 4

Sound waves travel fastest in solid medium.

Test: Light, Sound and Force - 2 - Question 5
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Refer to the given figure and select the correct option.
Detailed Solution for Test: Light, Sound and Force - 2 - Question 5

When a pushing force is applied, the object moves farther from the source of force. In case of opposing forces the object moves towards the weaker force. In case both the forces are equal, object shows no movement at all.

Test: Light, Sound and Force - 2 - Question 6
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A torch is shone on a wooden prism and a beach ball as shown below.

What will be the shape of shadow observed on the screen?
Test: Light, Sound and Force - 2 - Question 7
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The above figures show the force required to move a 100 g object over different surfaces. The friction is greatest at ____.
Detailed Solution for Test: Light, Sound and Force - 2 - Question 7

Friction is a force or resistance offered by a surface to the movement of object in contact. As it is shown, that on surface W, the force required to move an object is maximum, this shows that the opposing force of friction is provided maximum by surface W.

Test: Light, Sound and Force - 2 - Question 8
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Sandhya made a musical instrument as shown in the figure using large wooden box, a broom handle and a length of string.
She tightened the string by pulling harder on the broom handle. What kind of sound will she hear now?
Test: Light, Sound and Force - 2 - Question 9
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The girl a is putting more efforts to pull the sack bag as compared to the girl b. Girl a has to work more against a force which also _______.
Detailed Solution for Test: Light, Sound and Force - 2 - Question 9

Wheel cart reduces friction between sack bag and floor making it easier to pull the bag. Friction is present between a surface and object put on it and resists its motion. Friction is the force which prevents us from slipping when we walk.

Test: Light, Sound and Force - 2 - Question 10
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Ashish shone a torch at a ball. The shadow of the ball is projected onto a screen as shown.
What could Ashish do to get a smaller shadow of the ball on the screen?

1. Move the ball closer to the screen.         
2. Move the torch further away from the ball.  
3. Move the screen further away from the ball.
Detailed Solution for Test: Light, Sound and Force - 2 - Question 10

By increasing the distance between light source and object the size of the shadow can be reduced. The distance between them can be increased either by moving ball closer to the screen or by moving torch further away from the ball.

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