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

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Question number: 87

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

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.

Internal energy of the system decreases

b.

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

c.

The internal energy of the system remains the same

d.

The new potential of the drop is 80 V

Question number: 88

» Physics » Work and Energy

MCQ▾

Question

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.

1: 2

b.

1: 6

c.

4: 1

d.

√ 2: 1

Question number: 89

» Physics » Light

MCQ▾

Question

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

Choices

Choice (4) Response

a.

Laser

b.

Periscope

c.

Kaleidoscope

d.

All of the above

Question number: 90

» Physics » Motion and Force

MCQ▾

Question

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

Choices

Choice (4) Response

a.

Pressure of water increase with depth

b.

Density of water increases with depth

c.

Temperature of water increase with depth

d.

Quantity of water increases with depth

Question number: 91

» Physics » Motion and Force

MCQ▾

Question

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

Choices

Choice (4) Response

a.

Two Pieces must have equal weights

b.

Two Pieces must have equal volumes

c.

Two pieces of metal are floating to the same depth

d.

Two Pieces must have equal densities

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