# KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 27 - 30 of 268

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## Question number: 27

Appeared in Year: 2010

MCQ▾

### Question

The following travelling electromagnetic wave

, , is-

### Choices

Choice (4) Response

a.

Circularly polarized

b.

Unpolarized

c.

Linearly polarized

d.

Elliptically polarized

## Question number: 28

» Thermodynamics » Laws of Thermodynamics » Second Law of Thermodynamics

Appeared in Year: 2010

MCQ▾

### Question

A piece of hot copper at 1000C is plunged into a pond at 300C. The copper cools down to 300C, while the pond, being huge, stays at its initial temperature. Then-

### Choices

Choice (4) Response

a.

Copper loses some entropy; the pond stays at the same entropy

b.

Copper loses some entropy, and the pond gains exactly the same amount of entropy

c.

Copper loses entropy and the pond gains more than this amount of entropy

d.

copper and the pond gain in entropy

## Question number: 29

Appeared in Year: 2010

MCQ▾

### Question

In Young’s double slit experiment, the distance between the two slits is 0.1 mm, the distance between the slits and the screen is 1 m and the wavelength of the light used is 600 nm. The intensity at a point on the screen is 75 % of the maximum intensity. What is the smallest distance of this point from the central fringe?

### Choices

Choice (4) Response

a.

0.5 mm

b.

1.5 mm

c.

1.0 mm

d.

2.0 mm

## Question number: 30

Appeared in Year: 2010

MCQ▾

### Question

Consider the infinite ladder circuit shown below.

For which angular frequency ω will the circuit behave like a pure inductance?

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page