NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1359 - 1364 of 2184

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Passage

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

Angular width of central maximum in the Fraunhoffer-diffraction pattern of a slit is measured. The slit is illuminated by light of wavelength 6000 Å. When, the slit is illuminated by light of another wavelength, the angular width decreases by 30%.

Question number: 1359 (1 of 2 Based on Passage) Show Passage

» Wave Optics » Diffraction Due to a Single Slit Width of Central Maximum

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MCQ▾

Question

The wavelength of the light is

Choices

Choice (4) Response

a.

3500 Å

b.

5200 Å

c.

4200 Å

d.

5000 Å

Question number: 1360 (2 of 2 Based on Passage) Show Passage

» Wave Optics » Diffraction Due to a Single Slit Width of Central Maximum

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MCQ▾

Question

The same decrease in the angular width of central maximum is obtained when the original apparatus is immersed in a liquid. Find refractive index of the liquid.

Choices

Choice (4) Response

a.

2.43

b.

1.43

c.

1.23

d.

2.2

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.

Figure in A bar cross section with force acting on it

Figure in 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: 1361 (1 of 2 Based on Passage) Show Passage

» Properties of Solids & Liquids » Stress-Strain Relationship

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MCQ▾

Question

The shearing stress at the plane, in terms of F, A and θ is

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1362 (2 of 2 Based on Passage) Show Passage

» Properties of Solids & Liquids » Stress-Strain Relationship

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MCQ▾

Question

In the above problem, for what value of θ is the tensile stress maximum?

Choices

Choice (4) Response

a.

Zero

b.

45°

c.

30°

d.

90°

Question number: 1363

» Properties of Solids & Liquids » Temperature

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MCQ▾

Question

50 gm of copper is heated to increase its temperature 10°C. If the same quantity of heat is given to 10 gm water, the rise in its temperature is (Specific heat of copper = 420 Joule-kg -1 C -1)

Choices

Choice (4) Response

a.

8°C

b.

5°C

c.

7°C

d.

6°C

Question number: 1364

» Thermodynamics » Concept of Temperature

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Assertion-Reason▾

Question

Assertion (Ꭺ)

The specific heat of a gas in an adiabatic process is zero and in an isothermal process is infinite.

Reason (Ꭱ)

Specific heat of a gas is directly proportional to change of heat in system and inversely proportional change in temperature.

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.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are false