A musical instrument is producing continuous note. This note cannot be heard by a person having a normal hearing range. This note must then be passing through

(a)

wax

(b)

vacuum

(c)

water

(d)

empty vessel

Which of the following statement best describes frequency?

(a)

the number of complete vibrations per second.

(b)

the distance travelled by a wave per second.

(c)

the distance between one crest of wave and the next one.

(d)

the maximum disturbance caused by a wave.

In the sound wave produced by a vibrating turning fork as shown in the diagram, half the wave length is represented by:

(a)

BD

(b)

AB

(c)

AE

(d)

DE

When the pitch of note by a harmonium is lowered, then the wave length of the note

(a)

first decreases and then increases

(b)

decreases

(c)

remains the same

(d)

increases

Which of the following can produce longitudinal waves as well as transverse waves under different conditions?

(a)

TV transmitter

(b)

tuning fork

(c)

water

(d)

slinky