KVPY Stream-SA (Class 11) Physics: Questions 191 - 196 of 242

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Question number: 191

» Kinematics » Uniform and Non-Uniform Motion

MCQ▾

Question

A rocket is fired upward from the earth’s surface such that it creates an acceleration of 21.7 m s-2. If after 10 s, its engine is switched off, the maximum height of the rocket from earth’s surface would be-

Choices

Choice (4) Response

a.

3490 m

b.

2435.5 m

c.

2450 m

d.

3487.5 m

Question number: 192

» Ray Optics » Mirror Formula

MCQ▾

Question

In a concave mirror, an object is placed at a distance 25 cm from the focus and its image is formed at a distance 4 cm from the focus. The focal length of the mirror is,

Choices

Choice (4) Response

a.

15 cm

b.

20 cm

c.

10 cm

d.

5 cm

Question number: 193

» Current Electricity » Series and Parallel Combinations of Resistors

MCQ▾

Question

What will the value of R in the following electric circuit?

 An electric circuit consists of combination of resistors

an Electric Circuit Consists of Combination of Resistors

In figure an electric circuit consists of two resistance in series and one resistance is perpendicular to them.

Choices

Choice (4) Response

a.

3 Ω

b.

1 Ω

c.

2 Ω

d.

4 Ω

Question number: 194

» Kinematics » Motion in a Straight Line

MCQ▾

Question

A body moving in a straight line covers a distance of 12 m in the 2th second and 22 m in 5th sec. Distance will it cover in 7th second is –

Choices

Choice (4) Response

a.

22.21

b.

15.51

c.

17.53

d.

28.66

Question number: 195

» Ray Optics » Magnification

MCQ▾

Question

An object of height 2.5 cm is placed at a distance of 10 cm in front of a concave lens of power, – 12 diopters. The height of the image is –

Choices

Choice (4) Response

a.

2.46

b.

1.46

c.

1.13

d.

2.13

Question number: 196

» Thermodynamics » Concept of Temperature

MCQ▾

Question

During the melting of a slab of ice at 273 K at atmospheric pressure,

  1. Positive work is done by the ice water system on the atmosphere.
  2. Positive work is done on the ice water system by the atmosphere.
  3. Internal energy of the ice water system increases
  4. Internal energy of the ice water system decreases.

Choices

Choice (4) Response

a.

(1) and (4) are correct

b.

(1), (2) and (3) are correct

c.

(2) and (3) are correct

d.

(1) and (3) are correct

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