NEET Physics: Questions 1197 - 1201 of 2098

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Question number: 1197

» Properties of Solids & Liquids » Stress-Strain Relationship

MCQ▾

Question

A wire of length lm is stretched by a force of 15 N. The area of cross-section of the wire is 2 × 10 6 m 2 and Y is 2 × l0 -6 N/m 2. Increase in length of the wire will be -

Choices

Choice (4) Response

a.

3.75 × 10 -5 m

b.

4.45 × 10 -5 m

c.

2.25 × 10 -5 m

d.

Question does not provide sufficient data or is vague

Question number: 1198

» Wave Optics » Brewster's Law

MCQ▾

Question

A light has amplitude A and angle between analyser and polariser is 60°. Light transmitted by analyser has amplitude

Choices

Choice (4) Response

a.

A2

b.

3A2

c.

A2

d.

A2

Question number: 1199

» Wave Optics » Young's Double Slit Experiment

MCQ▾

Question

The width of one of the two slits in a Young’s double slit experiment is double of the other slit. Assuming that the amplitude of the light is coming from a slit is proportional to slit-width. Find the ratio of the maximum to the minimum intensity in the interference pattern.

Choices

Choice (4) Response

a.

9: 1

b.

16: 1

c.

34: 1

d.

4: 1

Question number: 1200

» Properties of Solids & Liquids » Young's Modulus

MCQ▾

Question

For a given material, the Young’s modulus is 2.8 times that of rigidity modulus. It’s Poisson’s ratio is

Choices

Choice (4) Response

a.

2

b.

0.4

c.

1.02

d.

0.2

Question number: 1201

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

Flask is filled up to a mark with 50 cc of mercury at 8°C. If the flask and contents are heated to 38°C, how much mercury will be above the mark? (α for glass is 9 × 10 -6 /°C and coefficient of real expansion of mercury is 180 × 10 -6)

Choices

Choice (4) Response

a.

0.05

b.

0.85 cc

c.

0.46 cc

d.

0.153 cc

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