Physics [NSTSE (National Science Talent Search Exam- Unified Council) Class 8]: Questions 144 - 149 of 219

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Question number: 144

Physics
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Question

MCQ▾

In which of the following phenomena, the brain continues to sense the image, even after the object has been removed?

Choices

Choice (4)Response

a.

Optical error

b.

Persistence of eye

c.

Illusion of eye

d.

All of the above

Question number: 145

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Question

MCQ▾

A vessel is connected with electrodes and it filled with a liquid, which allows the electric current flow. Which of the following liquid can be possible in vessel?

Choices

Choice (4)Response

a.

Helium

b.

Salt water

c.

Distilled water

d.

Question does not provide sufficient data or is vague

Question number: 146

Physics
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Question

MCQ▾

Friction is a:

Choices

Choice (4)Response

a.

Scalar

b.

Constant

c.

Vector

d.

Can be scalar or vector

Question number: 147

Physics
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Question

MCQ▾

As shown in following figure, an object is placed on a table. If force of is required to move an object from rest, then value of static friction is:

An object on a table

An Object on a Table

Loading Image

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 148

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Question

MCQ▾

Galvanic Cell converts:

Choices

Choice (4)Response

a.

Mechanical energy into chemical energy

b.

Chemical energy into mechanical energy

c.

Chemical energy into electric energy

d.

Electric energy into chemical energy

Question number: 149

Physics
Edit

Question

MCQ▾

If two plane mirrors are place at an angle of , then number of images formed by these two plane mirrors is:

Choices

Choice (4)Response

a.

8

b.

9

c.

2

d.

4