AIPMT 2014 | Waves Question 23 | Physics

If n₁, n₂ and n₃ are the fundamental frequencies of three segments into which a string is divided, then the original fundamental frequency n of the string is given by

$${1 \over n} = {1 \over {{n_1}}} + {1 \over {{n_2}}} + {1 \over {{n_3}}}$$

$${1 \over {\sqrt n }} = {1 \over {\sqrt {{n_1}} }} + {1 \over {\sqrt {{n_2}} }} + {1 \over {\sqrt {{n_3}} }}$$

$$\sqrt n = \sqrt {{n_1}} + \sqrt {{n_2}} + \sqrt {{n_3}} $$

n $$=$$ n₁ + n₂ + n₃

NEET 2013 (Karnataka)

MCQ (Single Correct Answer)

-1

The length of the wire between two ends of a sonometer is 100 cm. What should be the positions of two bridges below the wire so that the three segments of the wire have their fundamental frequencies in the ratio 1 : 3 : 5.

$${{1500} \over {23}}cm,{{500} \over {23}}cm$$

$${{1500} \over {23}}cm,$$ $${{300} \over {23}}cm$$

$${{300} \over {23}}cm,{{1500} \over {23}}cm$$

$${{1500} \over {23}}cm,{{2000} \over {23}}cm$$

NEET 2013 (Karnataka)

MCQ (Single Correct Answer)

-1

Out of Syllabus

Two sources P and Q produce notes of frequency 660 Hz. each. A listener moves from P to Q with a speed of 1 ms^$$-$$1. If the speed of sound is 330 m/s, then the number of beats heard by the listener per second will be

zero

NEET 2013

MCQ (Single Correct Answer)

-1

A source of unknown frequency gives 4 beats/s when sounded with a source of known frquency 250 Hz. The second harmonic of the source of unknown frequency gives five beats per second, when sounded with a source of frequency 513 Hz. The unknown frequency is

240 Hz

260 Hz

254 Hz

246 Hz

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Biology

Zoology

Human Health and Diseases Body Fluids and Its Circulation Locomotion and Movement Neural Control and Coordination Reproduction in Organisms Reproductive Health Structural Organisation in Animals Digestion and Absorption Excretory Products and Their Elimination Chemical Coordination and Integration Human Reproduction Animal Kingdom Breathing and Exchange of Gases Evolution