NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1181 - 1183 of 2320

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Question number: 1181

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

Edit
Assertion-Reason▾

Question

Assertion (Ꭺ)

The velocity increases, when water flowing in broader pipe enters a narrow pipe.

Reason (Ꭱ)

According to equation of continuity, product of area and velocity is constant.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are false

b.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Ꭺ is true but Ꭱ is false

Question number: 1182

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

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MCQ▾

Question

Two spectral line of sodium D 1 & D 2 have wavelengths of approximately 5890 Å and 5896 Å. A sodium lamp sends incident plane wave on to a slit of width 2 micrometer. A screen is located at 2 m from the slit. Find the spacing between the first maxima of two sodium lines as measured on the screen.

Choices

Choice (4)Response

a.

9 × 10 -4

b.

10 -4 m

c.

9 × 10 4 m

d.

All of the above

Question number: 1183

» Properties of Solids & Liquids » Young's Modulus

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MCQ▾

Question

The Young’s modulus of steel is 2 × 10 11 N/m 2 and its coefficient of linear expansion is 1.1 × 10 -5 per degree. The pressure to be applied to the ends of a steel cylinder to keep its length constant on raising its temperature by 80°C, will be -

Choices

Choice (4)Response

a.

1.76 × 10 8 N /m 2

b.

5.5 × 10 4 N/m 2

c.

2.2 × 10 8 N/m 2

d.

1.8 × 10 6 N/m 2

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