NEET Physics: Questions 1258 - 1263 of 2098

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Question number: 1258

» Thermodynamics » Concept of Temperature

MCQ▾

Question

When an ideal diatomic gas is heated at constant pressure, the fraction of the heat energy supplied which increases the internal energy of the gas, is

Choices

Choice (4) Response

a.

35

b.

25

c.

34

d.

57

Question number: 1259

» Dual Nature of Matter and Radiation » De-Broglie Relation

MCQ▾

Question

An electron microscope uses 40 keV electrons. Find its resolving limit on the assumption that it is equal to the wavelength of the electron-

Choices

Choice (4) Response

a.

0.061 Å

b.

0.6 Å

c.

0.61 Å

d.

0.06 Å

Question number: 1260

» Properties of Solids & Liquids » Newton's Law of Cooling

MCQ▾

Question

A body initially at 90° C cools to 60° C in 5 minutes and to 50° C in 10 minutes. The temperature of the body after 15 minutes will be

Choices

Choice (4) Response

a.

39.65° C

b.

48.70° C

c.

42.7° C

d.

45° C

Question number: 1261

» Properties of Solids & Liquids » Elastic Behavior

MCQ▾

Question

The work done in increasing the length of a one meter long wire of cross-sectional area 1mm 2 through 1mm will be

(Y = 2 × 10 11 N/m 2)

Choices

Choice (4) Response

a.

250 J

b.

5 J

c.

10 J

d.

0.1 J

Question number: 1262

» Properties of Solids & Liquids » Heat Transfer » Radiation

MCQ▾

Question

A body cools from 60° C to 50° C in 10 minutes. If the room temperature is 25° C and assuming Newton ’s law of cooling to hold good, the temperature of the body at the end of the next 10 minutes will be

Choices

Choice (4) Response

a.

42.85° C

b.

40° C

c.

45° C

d.

38.5° C

Question number: 1263

» Dual Nature of Matter and Radiation » De-Broglie Relation

MCQ▾

Question

de-Broglie wavelength of an electron is 10 Å then velocity will be

Choices

Choice (4) Response

a.

7.2 × 10 7 m/s

b.

7.2 × 10 6 m/s

c.

7.2 × 10 4 m/s

d.

7.2 × 10 5 m/s

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