# CTET Paper-II Science: Questions 40 - 43 of 207

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## Question number: 40

MCQ▾

### Question

The time period of the produced sound is 0.006 seconds, then what is the frequency of the sound?

### Choices

Choice (4) Response

a.

170 Hz

b.

600 Hz

c.

166.67 Hz

d.

175 Hz

## Question number: 41

Appeared in Year: 2015

MCQ▾

### Question

Which one of the following can be used to form a virtual and magnified image of an object? (Feb)

### Choices

Choice (4) Response

a.

Convex mirror and convex lens

b.

Convex lens only

c.

Concave mirror and convex lens

d.

Concave lens only

## Question number: 42

Appeared in Year: 2015

MCQ▾

### Question

An object of mass 6 kg is sliding on a frictionless horizontal surface with a uniform speed of 3 . The force required to keep the object moving at the same speed along the same straight line is (Feb)

### Choices

Choice (4) Response

a.

27 newton

b.

18 newton

c.

54 newton

d.

Zero newton

## Question number: 43

Appeared in Year: 2015

MCQ▾

### Question

A class VIII student makes the statement: “We live inside the Earth and it is round. That’s why Columbus’s ship returned to the starting point”. How the science teacher of class VIII is best advised to react? (Feb)

### Choices

Choice (4) Response

a.

Challenge the child’s idea by presenting pictures taken from the space and helping her in understanding how large the radius of the Earth is.

b.

Explain that although the Earth is round like a ball yet it appears circular like a plate.

c.

Reject the statement and tell the child that it is like a globe and we live on the surface of the round Earth.

d.

Accept the statement as it indicates the child’s idea and needs to be respected.

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