Physics [NSTSE (National Science Talent Search Exam- Unified Council) Class 8]: Questions 46 - 50 of 219

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Question 46

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Question

MCQ▾

In figure a cuboid of mass is placed on a surface in three different position.

A cuboid placed in three different positions

A Cuboid Placed in Three Different Positions

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In which position, pressure exerted by the cuboid on the surface is maximum?

Choices

Choice (4)Response

a.

Position (2)

b.

Position (3)

c.

In all cases pressure remains same.

d.

Position (1)

Question 47

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Question

MCQ▾

If a body moves in a straight line with constant speed, which of the following force is acted on it?

Choices

Choice (4)Response

a.

Magnetic force

b.

Gravitational force

c.

No force acts on body

d.

Friction force

Question 48

Physics
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Question

MCQ▾

The speed of sound in a medium varies with:

Choices

Choice (4)Response

a.

Temperature

b.

Humidity

c.

Density

d.

All a. , b. and c. are correct

Question 49

Physics
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Question

MCQ▾

The velocity of the sound on moon is:

Choices

Choice (4)Response

a.

0

b.

c.

d.

Question 50

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Question

MCQ▾

A cylindrical container filled with water as shown in figure. are closed holes of equal diameter at different height of the container. If we open these holes, through which hole, water covers a maximum horizontal distance?

A container with holes

A Container with Holes

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Choices

Choice (4)Response

a.

S

b.

P

c.

R

d.

Q