NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1321 - 1325 of 2184

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Question number: 1321

» Dual Nature of Matter and Radiation » De-Broglie Relation

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MCQ▾

Question

Velocity of a proton is . Associated de-Broglie wavelength is (Take h = 6.626 × 10 -34 J-s)

Choices

Choice (4) Response

a.

2.64 × 10 -14 m

b.

2.64 × 10 -24 cm

c.

2.64 × 10 -24 mm

d.

2.64 × 10 -14 A

Question number: 1322

» Dual Nature of Matter and Radiation » Einstein's Photoelectric Equation

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Assertion-Reason▾

Question

Assertion (Ꭺ)

Mass of moving photon varies directly as the wavelength.

Reason (Ꭱ)

Energy of the particle = Mass × (Speed of light) 2

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Ꭺ is true but Ꭱ is false

d.

Ꭺ is false but Ꭱ is true

Question number: 1323

» Properties of Solids & Liquids » Elastic Behavior

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MCQ▾

Question

The force required to separate two glass plates of area 10 -2 m 2 with a film of water 0.05 mm thick between them, is (Surface tension of water is 70 × 10 -3 N/m)

Choices

Choice (4) Response

a.

38 AT

b.

28 N

c.

14 N

d.

50 N

Question number: 1324

» Properties of Solids & Liquids » Heat Transfer » Convection

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MCQ▾

Question

Two rods A and B are of equal lengths. Their ends are kept between the same temperature and their areas of cross-sections are A 1 and A 2 and thermal conductivities K 1 and K 2. The rate of heat transmission in the two rods will be equal, if

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1325

» Properties of Solids & Liquids » Terminal Velocity

Edit
Assertion-Reason▾

Question

Assertion (Ꭺ)

Bernoulli’s theorem holds for incompressible, non-viscous fluids.

Reason (Ꭱ)

The factor is called velocity head.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are false