NEET Physics: Questions 1481 - 1484 of 2099

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Question number: 1481

» Kinetic Theory of Gases » Kinetic Energy and Temperature

MCQ▾

Question

At which of the following temperature would the molecule of a gas have twice the average kinetic energy they have 20°C?

Choices

Choice (4) Response
a.

40° C

b.

586° C

c.

313°C

d.

80° C

Question number: 1482

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

MCQ▾

Question

A homogeneous solid cylinder of length L (L<H2) and cross-sectional area A4 is immersed such that it floats with its axis vertical at the liquid-liquid interface with length L4 in the denser liquid as shown in the fig. The lower density liquid is open to atmosphere having pressure P Q. Then density of solid is given by

homogeneous solid cylinder in liquid with length L/4

Homogeneous Solid Cylinder in Liquid With Length L/4

Here in above fig we show that homogenous cylinder of length in liquid phase interface with length L/4.

Choices

Choice (4) Response
a.

Dd

b.

D=d

c.

D<d

d.

D>d

Question number: 1483

» Atoms and Nuclei » Nuclear Fission and Fusion

MCQ▾

Question

Power output of 92 U 235 reactor if it takes 30 days to use up 2 kg of fuel, and if each fission gives 185 MeV of useable energy is-

Choices

Choice (4) Response
a.

5.846 kW

b.

0.5846 kW

c.

58.46 MW

d. Question does not provide sufficient data or is vague

Question number: 1484

» Thermodynamics » Concept of Temperature

MCQ▾

Question

Efficiency of a Carnot engine is 50 % when temperature of outlet is 400 K. In order to increase efficiency up to 70 % keeping temperature of intake the same what will be temperature of outlet

Choices

Choice (4) Response
a.

690 K

b.

240 K

c.

460 K

d.

870 K

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