NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1317 - 1321 of 2320

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Question number: 1317

» Dual Nature of Matter and Radiation » Photoelectric Effect

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MCQ▾

Question

Light of wavelength 3320 A is incident on metal surface (work function = 1.07 eV). To stop emission of photo electron, retarding potential required to be

(Take hc = 12420 eV- Å)

Choices

Choice (4)Response

a.

2.67 V

b.

3.74 V

c.

4.81V

d.

1.07 V

Question number: 1318

» Properties of Solids & Liquids » Surface Energy and Surface Tension

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MCQ▾

Question

Which graph represents the variation of surface tension with temperature over small temperature ranges for water?

Choices

Choice (4)Response

a.

Curve of Surface tension → Temparature. choice A.

Curve of Surface Tension → Temparature. Choice A

b.

Curve of Surface tension → Temparature.Choice B

Curve of Surface Tension → Temparature. Choice B

c.

Curve of Surface tension → Temparature. Choice C

Curve of Surface Tension → Temparature. Choice C

d.

Curve of Surface tension → Temparature. Choice D

Curve of Surface Tension → Temparature. Choice D

Passage

Read the passage given below and answer the questions that follow:

A bar of cross section A is subjected to equal and opposite tensile forces F at its ends. Consider a plane through the bar making an angle θ with a plane at right angles to the bar as shown in figure.

A bar cross section with force acting on it

A Bar Cross Section with Force Acting on It

Question number: 1319 (1 of 1 Based on Passage) Show Passage

» Properties of Solids & Liquids » Stress-Strain Relationship

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MCQ▾

Question

The tensile stress, at this plane in terms of F, A and θ is

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 1320

» Thermodynamics » Concept of Temperature

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MCQ▾

Question

An ideal gas at 27°C is compressed adiabatically to of its original volume. If , then the rise in temperature

Choices

Choice (4)Response

a.

405 K

b.

225 K

c.

450 K

d.

375 k

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

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