Wave Mechanics Beats Question 30
Question: An unknown frequency x produces 8 beats per seconds with a frequency of 250 Hz and 12 beats with 270 Hz source, then x is
[CPMT 1997; KCET 2000]
Options:
A) 258 Hz
B) 242 Hz
C) 262 Hz
D) 282 Hz
Show Answer
Answer:
Correct Answer: A
Solution:
Since source of frequency x gives 8 beats per second with frequency 250 Hz, it’s possible frequency are 258 or 242.
As source of frequency x gives 12 beats per second with a frequency 270 Hz, it’s possible frequencies 282 or 258 Hz.
The only possible frequency of x which gives 8 beats with frequency 250 Hz also 12 beats per second with 258 Hz.
BETA
