Subject :NSO Class : Class 7
Subject :NSO Class : Class 8
The diagram shows a ray of light reflected at a plane mirror.
Which pair of the angle of incidence and angle of reflection is correct?
Angle of incidence | Angle of reflection | |
A | 30° | 30° |
B | 30° | 60° |
C | 60° | 30° |
D | 60° | 60° |
Post Your Answer
Subject :NSO Class : Class 6
Post Your Answer
Subject :NSO Class : Class 7
Post Your Answer
Subject :NSO Class : Class 5
Post Your Answer
Subject :NSO Class : Class 8
Post Your Answer
Subject :NSO Class : Class 8
Fill in the blanks by choosing an appropriate option. The loudness of sound depends on its _(i)_ . The _(ii)_ determines the pitch of a sound. A bird makes a _(iii)_ sound where as a lion makes a _(iv)_ sound. Usually voice of a woman has a _(v)_ frequency than that of a man.
(i) | (ii) | (iii) | (iv) | (v) | |
---|---|---|---|---|---|
A | Amplitude | Frequency | Low-piched | High-piched | Lower |
B | Pitch | Frequency | Low-piched | High-piched | Lower |
C | Amplitude | Frequency | High-piched | Low-piched | Higher |
D | Frequency | Pitch | High-piched | Low-piched | Higher |
how it is
Post Your Answer
Subject :NSO Class : Class 6
Post Your Answer
Subject :NSO Class : Class 6