Subject :NSO Class : Class 3
The given diagram shows a fishing boat which sends out ultrasound waves that return after a few seconds. Select the correct statement regarding this.
A The ultrasound waves are used to locate the shoal of fish.
B The ultrasound waves are reflected back from the shoal of fish.
C Sound can travel in water.
D All of these
d
Ans 1:
Class : Class 4
d
Ans 2:
Class : Class 7
D , tricky one
Ans 3:
Class : Class 8
tricky one
Ans 4:
Class : Class 3
D
Ans 5:
Class : Class 4
Ans 6:
Class : Class 3
D