NSO Level 1- Science Olympiad (SOF) Class 7: Questions 37 - 41 of 597

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Question 37

Question

MCQ▾

Which type of mirror do the dentists use to focus a beam of light to see inside a patient՚s mouth?

Choices

Choice (4)Response

a.

Concave Mirror

b.

Convex Mirror

c.

Plane Mirror

d.

Question does not provide sufficient data or is vague

Question 38

Question

MCQ▾

When object is placed very close to the convex lens, the image is:

Choices

Choice (4)Response

a.

Erect, virtual and smaller than object

b.

Erect, virtual and larger than object

c.

Erect, real and smaller than object

d.

Inverted, real and larger than object

Question 39

Question

MCQ▾

Aryan has 5 pairs of jeans, 4 shirts and 2 pairs of shoes. He wears a different outfit everyday. How many possible combinations can he wear?

Choices

Choice (4)Response

a.

34

b.

40

c.

38

d.

42

Question 40

Question

MCQ▾

Let two planes mirrors are placed parallel to each other, and a light ray incident on a mirror, which is reflected repeatedly. After some reflection the intensity of light rays:

Choices

Choice (4)Response

a.

Decrease

b.

Increase

c.

Remains same

d.

Question does not provide sufficient data or is vague

Question 41

Question

MCQ▾

A disc on which seven colors are painted in seven different sectors, is called:

Choices

Choice (4)Response

a.

Galileo՚s disc

b.

Newton՚s disc

c.

Faraday՚s disc

d.

Rutherford՚s disc

Developed by: