KVPY Stream-SA (Class 11) Physics: Questions 18 - 21 of 242

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Question number: 18

» Gravitation » Gravitational Acceleration

MCQ▾

Question

Consider two spherical planets of same average density moving around the Earth in circular orbits. Planet 2 is 8 times as massive as planet 1. And distance between Earth and planet 1 is twice than that of planet 2. The ratio of the acceleration due to gravity of the second planet to that of first is,

Choices

Choice (4) Response
a.

8

b.

64

c.

16

d.

32

Question number: 19

» Oscillations and Waves » Periodic Motion - Period Frequency

Appeared in Year: 2010

MCQ▾

Question

A hollow pendulum bob filled with water has a small hole at the bottom through which water escapes at a constant rate. Which of the following statements describes the variation of the time period (T) of the pendulum as the water flows out?

Choices

Choice (4) Response
a.

T decreases first and then increases

b.

T does not change

c.

T increases throughout

d.

T increases first and then decreases

Question number: 20

» Kinematics » Relative Velocity

Appeared in Year: 2011

MCQ▾

Question

A girl standing at point P on a beach wishes to reach a point Q in the sea as quickly as possible. She can run at 6 km h –1 on the beach and swim at 4 km h –1 in the sea. She should take the path,

Four different paths from P to Q

Four Different Paths From P to Q

Figure shows four different paths for reaching P to Q.

Choices

Choice (4) Response
a.

PCQ

b.

PDQ

c.

PAQ

d.

PBQ

Question number: 21

» Ray Optics » Reflection and Refraction of Light

Appeared in Year: 2010

Short Answer Question▾

Write in Short

A point source is placed 20 cm to the left of a concave lens of focal length 10 cm.

(a) Where is the image formed?

(b) Where to the right of the lens would you place a concave mirror of focal length 5 cm such that the final image is coincident with the source?

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