Waves Test

Result

Waves Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

A tuning fork when sounded along with a standard source of frequency 300 Hz produces 5 beat /s. The tuning fork when loaded by some wax is again found to give 5 beats/s with the standard source. The frequency of the fork originally was

A
295 Hz

B
290 Hz

C
310 Hz

D
305 Hz

Solution

Here beat frequency is v_beat =5 beat/second
Beat frequency vbeatvbeat = f₁ − f₂ here given that f₂ is 300 hz thus
f₁= 300 + 5
f₁= 305 hz
Question 2
1 / -0

Which waves are used in sonography?

A
Sound waves

B
Ultrasonic waves

C
Microwaves

D
Infra-red waves

Solution

Ultrasound imaging, also called ultrasound scanning or sonography involves the use of a small transducer (probe) and ultrasound gel placed directly on the skin. High-frequency sound waves are transmitted from the probe through the gel into the body.

These high frequency sound waves are ultrasonic waves