NEET (National Eligibility cum Medical Entrance Test) Physics: Questions 1230 - 1234 of 2142

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Question number: 1230

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

The apparent coefficient of expansion of a liquid when heated in a copper vessel is C and when heated in a silver vessel is S. If A is the linear coefficient of expansion of copper, then the linear coefficient of expansion of silver

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 1231

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

An iron tire is to be fitted on to a wooden wheel 1 m in diameter. The diameter of tire is 6mm smaller than that of wheel. The tire should be heated so that its temperature increases by a minimum of (the coefficient of cubical expansion of iron is 3.6 × 10 -5 /°C)

Choices

Choice (4) Response

a.

500°C

b.

167°C

c.

334°C

d.

1000°C

Question number: 1232

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

MCQ▾

Question

Light of wavelength 6328 Å is incident normally on slit having a width of 0.2 mm. The width of the central maximum measured from minimum to minimum of diffraction pattern on a screen 9.0 meters away will be about –

Choices

Choice (4) Response

a.

0.36°

b.

0.09°

c.

0.18°

d.

0.72°

Question number: 1233

» Properties of Solids & Liquids » Modulus of Rigidity

MCQ▾

Question

The compressibility of water is 5 × 10 -10 m 2 /N. If it is subjected to a pressure of 15 MPa the fractional decrease in volume will be -

Choices

Choice (4) Response

a.

7.5 ×10 -3

b.

1.5 × 10 -2

c.

5.6 × 10 -4

d.

3.3 × 10 -5

Question number: 1234

» Properties of Solids & Liquids » Hooke's Law

MCQ▾

Question

A wire of length lm and area of cross section 4 × 10 -8 m 2 increases in length by 0.2 cm when a force of 16 N is applied. Value of Y for the material of the wire will be

Choices

Choice (4) Response

a.

2 × l0 11 N/mm 2

b.

2 × 10 11 kg/m 2

c.

2 × l0 6 N/m 2

d.

2 × 10 11 N/m 2

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