Olympiad Test Level 2: Light, Sound and Force

# Olympiad Test Level 2: Light, Sound and Force

Test Description

## 15 Questions MCQ Test Science Olympiad: Class 3 | Olympiad Test Level 2: Light, Sound and Force

Olympiad Test Level 2: Light, Sound and Force for Class 3 2022 is part of Science Olympiad: 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 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Olympiad Test Level 2: Light, Sound and Force below.
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Olympiad Test Level 2: Light, Sound and Force - Question 1

### 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

### 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

Firefly (Jugnu) is a luminous object.

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

### 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

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

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

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

The given groups categorise objects on the basis that they give light or not. Each group contains one wrong member which has been encircled. Select the group in which the wrong member is encircled INCORRECTLY.

Detailed Solution for Olympiad Test Level 2: Light, Sound and Force - Question 7 Table lamp and Tube light are luminous objects, and the Moon is a non-luminous object.
Olympiad Test Level 2: Light, Sound and Force - Question 8

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

In the given picture, the girl 'a' is putting more effort into pulling the sack bag as compared to the girl 'b'. Girl 'a' has to work more against a force which also ________.

Detailed Solution for Olympiad Test Level 2: Light, Sound and Force - 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.
Olympiad Test Level 2: Light, Sound and Force - Question 10

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 Closing a car door from outside shows push action of force. The force only moves the door. It does not change the shape of the wristband.
Olympiad Test Level 2: Light, Sound and Force - Question 11

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 and shape 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

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

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

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

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.