NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1274 - 1277 of 2320

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Question number: 1274

» Properties of Solids & Liquids » Heat Transfer » Radiation

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MCQ▾

Question

Consider two hot bodies B 1 and B 2 which have temperature 100° C and 80° C respectively at t = 0. The temperature of surroundings is 40° C. The ratio of the respective rates of cooling R 1 and R 2 of these two bodies at t = 0 will be,

Choices

Choice (4)Response

a.

R 1: R 2 = 4: 5

b.

R 1 : R 2 = 2: 3

c.

R 1: R 2 = 5: 4

d.

R 1: R 2 = 3: 2

Question number: 1275

» Atoms and Nuclei » Hydrogen Spectrum

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MCQ▾

Question

Which of the series of hydrogen spectrum are not in the visible region?

(1) Lyman series (2) Paschen series

(3) Bracket series (4) Balmer series

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

Choices

Choice (4)Response

a.

1 and 3 are correct

b.

1 and 2 are correct

c.

1,2 and 3 are correct

d.

2 and 4 are correct

Question number: 1276

» Thermodynamics » Concept of Temperature

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MCQ▾

Question

If 300 ml of gas at 27°C is cooled to 7°C at constant pressure, then its final volume will be

Choices

Choice (4)Response

a.

135 ml

b.

540 ml

c.

280 ml

d.

350 ml

Question number: 1277

» Wave Optics » Young's Double Slit Experiment

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Assertion-Reason▾

Question

Assertion (Ꭺ)

In Young’s experiment, the fringe width for dark fringes is same as that for white fringes.

Reason (Ꭱ)

In Young’s double slit experiment performed with a source of white light, only black and bright fringes are observed.

Choices

Choice (4)Response

a.

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

b.

Ꭺ is false but Ꭱ is true

c.

Both Ꭺ and Ꭱ are false

d.

Ꭺ is true but Ꭱ is false

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