1
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
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A string 2.0 m long and fixed at its ends 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
180m/s, 80 Hz
B
180m/s, 120 Hz
C
320m/s, 120 Hz
D
320m/s, 80 Hz
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