| ⇦ | 
| ⇨ |
A source of unknown frequency gives 4 beats/s, when sounded with a source harmonic of the source of unknown frequency gives 5 beats/s, when sounded with a source of frequency 513 Hz. The unknown frequency is
Options
(a) 246 Hz
(b) 240 Hz
(c) 260 Hz
(d) 254 Hz
Correct Answer:
254 Hz
Explanation:
When sounded with a source of known frequency fundamental frequency = 250 +- 4 Hz. = 254 Hz or 246 Hz. second harmonic if unknown frequency (suppose) 254 Hz = 2 x 254 = 508 Hz. As it is gives 5 beats 508 + 5 = 513 Hz.
Hence, unknown frequency is 254 Hz.
Related Questions: - If the alternating current I=I₁ cosωt+I₂ sinωt, then the rms current is given by
- In Bohr model of hydrogen atom, the force on the electron depends on the principal
- Colours appear on a thin soap film and soap bubbles due to the phenomenon of
- A body weighs 50 grams in air and 40 grams in water. How much would it weigh in a liquid
- Two discs of moment of inertia I₁ and I₂ and angular speeds ?￢ﾂﾁ and ?￢ﾂﾂ are rotating
Topics: Waves
(80)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If the alternating current I=I₁ cosωt+I₂ sinωt, then the rms current is given by
- In Bohr model of hydrogen atom, the force on the electron depends on the principal
- Colours appear on a thin soap film and soap bubbles due to the phenomenon of
- A body weighs 50 grams in air and 40 grams in water. How much would it weigh in a liquid
- Two discs of moment of inertia I₁ and I₂ and angular speeds ?￢ﾂﾁ and ?￢ﾂﾂ are rotating
Topics: Waves (80)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply