Unit 10-11-12 Test 1

Question 1 of 12

1. Question

Snell’s law is stated as:

Sin i / sin r = n1/n2
sin i / sin r = n2/n1
sin r / sin i = n2/n1
sin r / sin i = 2n2/n1

Question 2 of 12

2. Question

Focal length for concave mirror is :

-ve
+ve
same
none of these

Question 3 of 12

3. Question

An object of placed at he centre of curvature of a concave mirror. The image produced by the mirror is located:

out beyond the centre of curvature.
at the centre of curvature
between the centre of curvature and the focal point
at the focal point

Question 4 of 12

4. Question

An object is 14 cm is front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror?

4.1 cm
8.2 cm
9.9 cm
20 cm

Question 5 of 12

5. Question

The particles of the solid can vibrate about their —-

Movement
Disturbance
Vibration
Elasticity

Question 6 of 12

6. Question

Vibration is also known as

Trip
Movement
Oscillation
Circulation

Question 7 of 12

7. Question

Motion of mass attached to spring is an example of _motion.

simple harmonic
linear
circular
vibration

Question 8 of 12

8. Question

The force applied on a body is directly proportional to the change in length.This is,

Weber Fechner law
Hooke's Law
Law of gravitation
Archimedes principle

Question 9 of 12

9. Question

The study of sound is called

Acoustic
Optics
Electrostatics
All of these

Question 10 of 12

10. Question

Sound is produced by _________

Propagation
Vibration
Both of these
None of these

Question 11 of 12

11. Question

Sound can travel only in presence of

Medium
vaccum
Air
Both a and c

Question 12 of 12

12. Question

Characteristic by which We can distinguishbetween two sounds of same loudness and pitch is called

Loudness
Pitch
Quality
intensity of sound