01 For humans, audible waves conventionally have frequencies:

RRB PYQ MCQ

02 A survey ship receives an echo from the ocean floor after 2.5…

RRB PYQ MCQ

03 To detect obstacles in their path, bats produce:

RRB PYQ MCQ

04 A sound wave has frequency 3.5 kHz and wavelength 0.1 m. How…

RRB PYQ MCQ

05 What is the lowest frequency conventionally audible to humans?

RRB PYQ MCQ

06 When an object’s speed exceeds the speed of sound, it travels at…

RRB PYQ MCQ

07 The frequency of ultrasonic sound is greater than:

RRB PYQ MCQ

08 Find the speed of sound in air from the following options.

RRB PYQ MCQ

09 The sound energy passing through unit area per second is called:

RRB PYQ MCQ

10 Speeds greater than the speed of sound in air are called:

RRB PYQ MCQ