Properties of Solids & Liquids (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 50 - 54 of 190

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Question number: 50

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

MCQ▾

Question

A film of water is formed between two straight parallel wires of length 15 cm each separated by 0.5 cm. If their separation is increased by 1 mm while still maintaining their parallelism, how much work will have to be done (Surface tension of water = 70 × 10 -2 N/m)

Choices

Choice (4) Response

a.

2.16 × 10 -5 Joule

b.

1.44 × 10 -5 Joule

c.

7.22 × 10 -6 Joule

d.

5.76 × 10 -5 Joule

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Question number: 51

» Properties of Solids & Liquids » Elastic Behavior

MCQ▾

Question

The force required to separate two glass plates of area 3 ×10 -2 m -2 with a film of water 0.03 m thick between them, is (Surface tension of water is 70 × 10 -3 N/m)

Choices

Choice (4) Response

a.

280 N

b.

130 N

c.

140 N

d.

380 AT

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Question number: 52

» Properties of Solids & Liquids » Young's Modulus

MCQ▾

Question

Which statements are false for a metal?

(a)

(b)

(c)

(d)

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1,2 and 3 are correct

b.

1 and 2 are correct

c.

2 and 4 are correct

d.

1 and 3 are correct

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Question number: 53

» Properties of Solids & Liquids » Terminal Velocity

MCQ▾

Question

Water is filled in a cylindrical container to a height of 3 m. The ratio of the cross-sectional area of the orifice and the beaker is 0.1. The square of the speed of the liquid coming out from the orifice is (g = 10m/s 2)

Choices

Choice (4) Response

a.

50 m 2 /s 2

b.

52 m 2 /s

c.

50.5 m 2 /s 2

d.

51 m 2 /s 2

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Question number: 54

» Properties of Solids & Liquids » Elastic Behavior

MCQ▾

Question

A uniform steel wire of density 7800 kg/m 3 is 2.5 m long and weighs 15.6 × 10 -3 kg. It extends by 1.25 mm when loaded by 8 kg. Calculate the value of young’s modulus of elasticity for steel.

Choices

Choice (4) Response

a.

19.6 × 10 11 N/m 2

b.

1.96 × 10 11 N/m 2

c.

196 × 10 11 N/m 2

d.

All of the above

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