NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1229 - 1232 of 2320

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Question number: 1229

» Properties of Solids & Liquids » Elastic Behavior

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MCQ▾

Question

A 4.0 m long copper wire of cross sectional area 1.2 cm 2 is stretched by a force of 4.8 × 10 3 N stress will be -

Choices

Choice (4)Response

a.

4.0 × l0 7 N/mm 2

b.

4.0 × l0 7 KN/m 2

c.

4.0 × l0 7 N/m 2

d.

None of the above

Question number: 1230

» Wave Optics » Polarization

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MCQ▾

Question

Out of the following statements which are correct?

(1) Nicol prism works on the principle of double refraction and total internal reflection

(2) Nicol prism can be used to produce and analyses polarised light

(3) Calcite and Quartz are both doubly refracting crystals

(4) When unpolarised light passes through a Nicol prism, the emergent light is elliptically polarized

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

Codes:

Choices

Choice (4)Response

a.

1 and 3 are correct

b.

2 and 4 are correct

c.

1,2 and 3 are correct

d.

1 and 2 are correct

Question number: 1231

» Properties of Solids & Liquids » Thermal Expansion

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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.

b.

c.

d.

Question number: 1232

» Properties of Solids & Liquids » Thermal Expansion

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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.

334°C

b.

1000°C

c.

167°C

d.

500°C

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