NEET Physics: Questions 1284 - 1288 of 2098

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2098 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

Question number: 1284

» Properties of Solids & Liquids » Hooke's Law

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

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

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.

W2πrTcosθ

b.

2πrTcosθW

c.

2πrT+W

d.

2πrTcosθ+W

Question number: 1286

» Wave Optics » Wavefront

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.

Graph of pressure vs volume (2V and 6V)

Graph of Pressure vs Volume (2V and 6V)

In above figure we show expansion of monoatomic molecule with change in pressure.

Question number: 1287 (1 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

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

» Thermodynamics » Thermal Equilibrium

MCQ▾

Question

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

Choices

Choice (4) Response

a.

QnT0

b.

Q3nT0

c.

2QnT0

d.

Q2nT0

Sign In