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Two closed organ pipes when sounded simultaneously give 4 beats/second. If longer pipe has a length of 1m, then length of shorter pipe will be (v=300 m/s)
Options
(a) 185.5 cm
(b) 94.9 cm
(c) 90 cm
(d) 80 cm
Correct Answer:
94.9 cm
Explanation:
n₂ – n₁ = 4, For closed pipe, n = V/4l
(V/4l₂) – (V/4l₁) = 4 ⇒ (V/4l₂) – (V/4×1) = 4
(300/4l₂) – (300/4) = 4 ⇒ 75/l₂ = 4 + 75 ⇒ 75/l₂ = 79
⇒ l₂ = (75/79) met = (75×100)/79 = 94.9 cm.
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An ideal gas is compressed to half its initial volume by means of several processes.
- Two coherent monochromatic beams of intensities I and 4I respectively, are superposed.
- A small angled prism of refractive index 1.4 is combined with another small angled prism
- Three resistances 2Ω, 3Ω and 4Ω are connected in parallel. The ratio of currents passing
- A solid which is transparent to visible light and whose conductivity increases
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Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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