# NEET Physics: Questions 1318 - 1323 of 2142

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## Passage

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.

## Question number: 1318 (1 of 1 Based on Passage) Show Passage

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: 1319

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.

450 K

b.

405 K

c.

225 K

d.

375 k

## Question number: 1320

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 -14 A

c.

2.64 × 10 -24 cm

d.

2.64 × 10 -24 mm

## Question number: 1321

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: 1322

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: 1323

» 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.

b.

c.

d.

f Page