# NEET (National Eligibility cum Medical Entrance Test) Physics: Questions 1864 - 1868 of 2142

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2142 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

## Question number: 1864

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.

356

b.

365

c.

1

d.

3.56 ⨯ 10 5

## Question number: 1865

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: 1866

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.

(0.1 ± 0.01) m

c.

(0.2 ± 0.01) m

d.

(0.1 ± 0.02) m

## Question number: 1867

MCQ▾

### Question

The frequency of fundamental tone in an open organ pipe of length 0.48 m is 320 Hz. Speed of sound is 320 m/sec. Frequency of fundamental tone in closed organ pipe will

### Choices

Choice (4) Response

a.

143.2 Hz

b.

320.0 Hz

c.

153.8 Hz

d.

160.0 Hz

## Question number: 1868

MCQ▾

### Question

A police car moving at 22 m/s, chases a motorcyclist. The police man sounds his horn at 176 Hz, while both of them move towards a stationary siren of frequency 165 Hz. Calculate the speed of the motorcycle, if it is given that he does not observes any beats

### Choices

Choice (4) Response

a.

33 m/s

b.

Zero

c.

11 m/s

d.

22 m/s

f Page