# Communication System (NEET Physics): Questions 1 - 4 of 42

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## Question number: 1

» Communication System » Propagation of Electromagnetic Waves in the Atmosphere

MCQ▾

### Question

The vernier constant of two vernier calipers A and B are 0.01 cm and 0.01 mm respectively. Which one can measure the length of an object more accurately?

### Choices

Choice (4) Response

a.

Accuracy in measurement does not depend on vernier constant

b.

Vernier B

c.

Vernier A

d.

All of the above

## Question number: 2

» Communication System » Propagation of Electromagnetic Waves in the Atmosphere

MCQ▾

### Question

One cm on the main scale of a vernier calipers is divided into ten equal parts. If 20 divisions of vernier scale coincide with 8 small divisions of the main scale. What will be the least count of calipers?

### Choices

Choice (4) Response

a.

0.05 cm

b.

0.06 cm

c.

0.04 cm

d.

0.01 cm

## Question number: 3

» Communication System » Propagation of Electromagnetic Waves in the Atmosphere

MCQ▾

### Question

The figure shows a situation when the jaws of vernier are touching each other. Each main scale division is of 1 mm. Find zero correction.

### Choices

Choice (4) Response

a.

+ 0.5 mm

b.

+ 0.4 mm

c.

- 0.4 mm

d.

- 0.5 mm

## Question number: 4

» Communication System » Bandwidth of Transmission Medium

MCQ▾

### Question

Consider the following statements regarding the experiment to determine the surface tension of water by capillary rise method. Choose the correct statements.

1. Capillary tube should be clean and liquid should be free from dirt and grease.
2. Distilled water should be avoided.
3. Distilled water should be added.
4. Dirty liquid should be used.

Select the correct answers and mark it according to the following codes:

### Choices

Choice (4) Response

a.

1, 2 and 3 are correct

b.

1 and 2 are correct

c.

2 and 4 are correct

d.

1 and 3 are correct

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