Physics [NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension]: Questions 87 - 91 of 136

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Question 87

Question MCQ▾

Eight identical spherical mercury drops charged to a potential of 20 V each are coalesced into a single spherical drop

Choices

Choice (4)Response

a.

The internal energy of the system remains the same

b.

Internal energy of the system decreases

c.

The new potential of the drop is 80 V

d.

The potential remains the same i.e.. , 20 V

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Question 88

Question MCQ▾

Two masses of 1 g and 4 g are moving with equal kinetic energies. The ratio of the magnitudes of their linear moments is

Choices

Choice (4)Response

a.

4: 1

b.

1: 6

c.

1: 2

d.

√ 2: 1

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Question 89

Question MCQ▾

Which of the following is employed to clearly view objects, which cannot be seen directly due to obstruction?

Choices

Choice (4)Response

a.

Kaleidoscope

b.

Laser

c.

Periscope

d.

Question does not provide sufficient data or is vague

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Question 90

Question MCQ▾

Why the dam of water reservoir is thick at the bottom?

Choices

Choice (4)Response

a.

Density of water increases with depth

b.

Pressure of water increase with depth

c.

Temperature of water increase with depth

d.

Quantity of water increases with depth

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Question 91

Question MCQ▾

Two pieces of metal when immersed in a liquid have equal upthrust on them, then

Choices

Choice (4)Response

a.

Two pieces of metal are floating to the same depth

b.

Two Pieces must have equal weights

c.

Two Pieces must have equal volumes

d.

Two Pieces must have equal densities

Edit