Sound
- The audible frequency range of a human ear is
-
View Hint View Answer Discuss in Forum
The audible frequency range of a human ear is 20 Hz to 20000 Hz.
Correct Option: D
The audible frequency range of a human ear is 20 Hz to 20000 Hz.
- Bats can ascertain distance, directions, nature and size of the obstacles at night. This is possible by reflection of the emitted
-
View Hint View Answer Discuss in Forum
Bat emitted ultrasonic sounds specifically to produce echoes. By comparing the outgoing pulse with the returning echoes the brain and auditory nervous system can produce detail image of surrounding.
Correct Option: A
Bat emitted ultrasonic sounds specifically to produce echoes. By comparing the outgoing pulse with the returning echoes the brain and auditory nervous system can produce detail image of surrounding.
- Microwave oven consumes less power due to
-
View Hint View Answer Discuss in Forum
Microwave oven consumes less power due to short wavelength of radiation.
Correct Option: B
Microwave oven consumes less power due to short wavelength of radiation.
- If you are at open- air concert and someone's head gets between you and the orchestra, you can still hear the orchestra because
-
View Hint View Answer Discuss in Forum
a head is not very large compared with the wavelength of the sound
Correct Option: B
a head is not very large compared with the wavelength of the sound
- A vibrating body
-
View Hint View Answer Discuss in Forum
will produce sound which depends upon frequency
Correct Option: C
will produce sound which depends upon frequency
