# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1863 - 1867 of 2320

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## Question number: 1863

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MCQ▾

### Question

The Jupiter’s period of revolution round the Sun is 12 times that of the Earth. Assuming the planetary orbits are circular, how many times the distance between the Jupiter and Sun exceeds that between the Earth and the sun.

### Choices

Choice (4)Response

a.

5.242

b.

2.242

c.

3.242

d.

4.242

## Question number: 1864

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MCQ▾

### Question

A source of sound emitting a note of frequency 200 Hz moves towards an observer with a velocity v equal to the velocity of sound. If the observer also moves away from the source with the same velocity v, the apparent frequency heard by the observer is,

### Choices

Choice (4)Response

a.

100 Hz

b.

200 Hz

c.

150 Hz

d.

50 Hz

## Question number: 1865

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MCQ▾

### Question

The moon revolves round the earth 13 times in one year. If the ratio of sun-earth distance to earth-moon distance is 393, then the ratio of masses of sun and earth will be –

### Choices

Choice (4)Response

a.

365

b.

1

c.

356

d.

3.56 ⨯ 10 5

## Question number: 1866

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MCQ▾

### Question

For sky wave propagation of a 10 MHz signal, what should be the minimum electron density in ionosphere,

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 1867

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MCQ▾

### Question

In an experiment to measure the focal length of a concave mirror, it was found that for an object distance of 0.30 m, the image distance come out to be 0.60 m. Determine the focal length.

### Choices

Choice (4)Response

a.

(0.2 + 0.02) m

b.

(0.2 ± 0.01) m

c.

(0.1 ± 0.01) m

d.

(0.1 ± 0.02) m

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