# NEET (NTA-National Eligibility cum Medical Entrance Test) Physics: Questions 1828 - 1832 of 2142

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## Question number: 1828

MCQ▾

### Question

An LED operates under which biasing condition?

### Choices

Choice (4) Response

a.

Reverse bias

b.

Forward bias

c.

Can operate both in forward and reverse bias

d.

All of the above

## Question number: 1829

MCQ▾

### Question

The ratio of the radius of the Earth to that of the moon is 10. The ratio of g on earth to the moon is 6. The ratio of the escape velocity from the earth’s surface to that from the moon is approximately –

### Choices

Choice (4) Response

a.

8

b.

2

c.

4

d.

10

## Question number: 1830

MCQ▾

### Question

To calculate an unknown resistance with the help of a meter bridge why is it advised to change the gap with the known and unknown resistance?

### Choices

Choice (4) Response

a.

To eliminate the resistance of the gap.

b.

To eliminate the resistance of the connecting wire and copper strip

c.

To include the resistance of the connecting wire and copper strip

d.

To balance the known and unknown resistance.

## Question number: 1831

MCQ▾

### Question

The loudness and the pitch of a sound depends on

### Choices

Choice (4) Response

a.

Intensity and frequency

b.

Frequency and velocity

c.

Intensity and velocity

d.

Frequency and number of harmonics

## Passage

Read the passage given below and answer the questions that follows:

It can be assumed that orbits of earth and mars are nearly circular around the sun. It is proposed to launch an artificial planet around the sun such that its apogee is at the orbit of mars while its perigee is at the orbit of earth. Let T e and T m be periods of revolution of earth and mars. Further the variables are assigned the meanings as follows.

M e → Mass of earth

M m → Mass of mars

L e → Angular momentum of earth around the sun

L m → Angular momentum of mars around the sun

R e → Semi major axis of earth’s orbit.

R m → Semi major axis of mars orbit.

M → Mass of the artificial planet

E e → Total energy of earth

E m → Total energy of mars.

## Question number: 1832 (1 of 2 Based on Passage) Show Passage

MCQ▾

### Question

Time period of revolution of the artificial planet about sun will be (neglect gravitational effects of earth and mars)

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page