NEET Physics: Questions 1319 - 1324 of 2099

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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

In above fig we shows that bars cross section which having equal and opposite force, making and angle θ with a plane.

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

» Properties of Solids & Liquids » Stress-Strain Relationship

MCQ▾

Question

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

Choices

Choice (4) Response
a.

Fsin2θA

b.

Fcos2θA

c.

FAcos2θ

d.

FAsin2θ

Question number: 1320

» Thermodynamics » Concept of Temperature

MCQ▾

Question

An ideal gas at 27°C is compressed adiabatically to 827 of its original volume. If γ=53 , then the rise in temperature

Choices

Choice (4) Response
a.

450 K

b.

405 K

c.

225 K

d.

375 k

Question number: 1321

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

MCQ▾

Question

Velocity of a proton is c20 . 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 -14 A

c.

2.64 × 10 -24 cm

d.

2.64 × 10 -24 mm

Question number: 1322

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

Assertion-Reason▾

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. Ꭺ is true but Ꭱ is false
c. Ꭺ is false but Ꭱ is true
d. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

Question number: 1323

» Properties of Solids & Liquids » Elastic Behavior

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.

50 N

b.

14 N

c.

28 N

d.

38 AT

Question number: 1324

» Properties of Solids & Liquids » Heat Transfer » Convection

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.

K1A12=K2A22

b.

K1A1=K2A2

c.

K1=K2

d.

K1A2=K2A1

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