NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1154 - 1157 of 2184

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Question number: 1154

» Atoms and Nuclei » Alpha-Particle Scattering Experiment

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MCQ▾

Question

An α- particle of 5 MeV energy strikes with a nucleus of uranium at stationary at an scattering angle of 180°. The nearest distance up to which α-particle reaches the nucleus will be closest to,

Choices

Choice (4) Response

a.

b.

c.

d.

1 A

Question number: 1155

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

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MCQ▾

Question

A screen is placed 2 m away from the single narrow slit. Calculate the slit width if the first minimum lies 5 mm on either side of the central maximum. Incident plane waves have a wavelength of 5000 Å.

Choices

Choice (4) Response

a.

2 × 10 -4 cm

b.

2 × 10 -4 m

c.

2 × 10 -3 cm

d.

None of the above

Question number: 1156

» Properties of Solids & Liquids » Young's Modulus

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MCQ▾

Question

A rod of length l and area of cross-section A is heated from 0°C to 100°C. The rod is so placed that it is not allowed to increase in length, then the force developed is proportional to

Choices

Choice (4) Response

a.

A -1

b.

I -1

c.

A

d.

I

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