A string 2.0 m long and fixed at its end is driven by a 240 Hz vibrator. The string vibrates in its third harmonic mode. The speed of the wave and its fundamental frequency is
(a)
320 m/s, 120 Hz
(b)
320 m/s, 80 Hz
(c)
180 m/s, 80 Hz
(d)
180 m/s, 120 Hz
A string 2.0 m long and fixed at its end is driven by a 240 Hz vibrator. The string vibrates in its third harmonic mode. The speed of the wave and its fundamental frequency is
(a)
320 m/s, 120 Hz
(b)
320 m/s, 80 Hz
(c)
180 m/s, 80 Hz
(d)
180 m/s, 120 Hz
Question ID - 51311 | SaraNextGen Top Answer
A string 2.0 m long and fixed at its end is driven by a 240 Hz vibrator. The string vibrates in its third harmonic mode. The speed of the wave and its fundamental frequency is
(a)
320 m/s, 120 Hz
(b)
320 m/s, 80 Hz
(c)
180 m/s, 80 Hz
(d)
180 m/s, 120 Hz
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A string 2.0 m long and fixed at its end is driven by a 240 Hz vibrator. The string vibrates in its third harmonic mode. The speed of the wave and its fundamental frequency is |
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|
(a) |
320 m/s, 120 Hz |
(b) |
320 m/s, 80 Hz |
|
(c) |
180 m/s, 80 Hz |
(d) |
180 m/s, 120 Hz |
1 Answer
127 votes
Answer Key / Explanation : (b) -
=
⇒ 
=
m
∴ v=
240=320m/s
3rd harmonic
fn=nf0
f0=
=80 Hz
127 votes
Answer Link
127