NEET (National Eligibility cum Medical Entrance Test) Physics: Questions 1284 - 1288 of 2142

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Question number: 1284

MCQ▾

Question

A wire of length l m and area of cross section 4 × 10 -8 m 2 increases in length by 0.4 cm when a force of 14 N is applied. Value of Y for the material of the wire will be

Choices

Choice (4) Response

a.

7.23 × 10 11 kg/m 2

b.

2.56 × 10 11 N/m 2

c.

2.46 × l0 11 N/mm 2

d.

8.75 × l0 6 N/m 2

Question number: 1285

MCQ▾

Question

A thin metal disc of radius r floats on water surface and bends the surface downwards along the perimeter making an angle 9 with vertical edge of the disc. If the disc displaces a weight of water W and surface tension of water is T, then the weight of metal disc is

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1286

MCQ▾

Question

When a mica sheet (µ = 1.6) of thickness 7 microns is placed in the path of one of interfering beams in the biprism experiment then the central fringe gets shifted at the position of seventh bright fringe. The wavelength of light used will be –

Choices

Choice (4) Response

a.

6000 Å

b.

7000 Å

c.

4000Å

d.

5000 Å

Passage

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

In the figure n mole of a monoatomic ideal gas undergo the process ABC as shown in the P-V diagram. The process AB is isothermal and BC is isochoric. The temperature of the gas at A is T 0. Total heat given to the gas during the process ABC is measured to be Q.

Question number: 1287 (1 of 3 Based on Passage) Show Passage

MCQ▾

Question

The average molar heat capacity of the gas in process ABC is

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1288 (2 of 3 Based on Passage) Show Passage

» Thermodynamics » Laws of Thermodynamics » Second Law of Thermodynamics

MCQ▾

Question

Temperature of the gas at C is equal to

Choices

Choice (4) Response

a.

6T 0

b.

T 0

c.

3T 0

d.

2T 0

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