# NEET Physics: Questions 1258 - 1263 of 2142

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## Question number: 1258

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.

b.

c.

d.

## Question number: 1259

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

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

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

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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