NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1157 - 1159 of 2320

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Question number: 1157

» Properties of Solids & Liquids » Thermal Expansion

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MCQ▾

Question

A bimetallic strip is heated. Choose wrong statements.

(1) Does not bend at all

(2) Gets twisted in the form of an helix

(3) Bends in the form of an arc with the more expandable metal inside.

(4) Bend in the form of an arc with the more expandable metal outside

Select the correct answers and mark it according to the following 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: 1158

» Properties of Solids & Liquids » Thermal Expansion

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MCQ▾

Question

A bimetallic strip is formed out of two identical strips, one of copper and other of brass. The coefficients of linear expansion of the two metals are a c and a b. On heating, the temperature of the strip goes up by ∆T and the strip bends to form an arc of radius of curvature R. Then R is

(1) Inversely proportional to ∆T

(2) Proportional to

(3) Inversely proportional to

(4) Proportional to

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 3 are correct

c.

2 and 4 are correct

d.

1 and 2 are correct

Question number: 1159

» Wave Optics » Polarization

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MCQ▾

Question

Which statements are incorrect for a zone plate and a lens?

(1) Zone plate has one focus whereas lens has multiple focal lengths

(2) Both zone plate and lens have multi focal lengths

(3) Zone plate has one focus whereas a lens has infinite

(4) Zone plate has multi focal lengths whereas lens has one

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

Codes:

Choices

Choice (4)Response

a.

1 and 3 are correct

b.

1 and 2 are correct

c.

2 and 4 are correct

d.

1,2 and 3 are correct

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