wave_mechanics critical_thinking Question 25
Question: 41 forks are so arranged that each produces 5 beats per sec when sounded with its near fork. If the frequency of last fork is double the frequency of first fork, then the frequencies of the first and last fork are respectively
[MP PET 1997; KCET 2002]
Options:
A) 200, 400
B) 205, 410
C) 195, 390
D) 100, 200
Show Answer
Answer:
Correct Answer: A
Solution:
Similar to previous question nFirst = nFirst + (N ? 1)x 2n = n + (41 ? 1) ´ 5
Therefore nFirst = 200 Hz and nLast = 400 Hz
BETA
