AIPMT 2014 | Waves Question 22 | Physics

A speeding motorcyclist sees traffic jam ahead him. He slows down to 36 km hour^$$-$$1. He finds that traffic has eased and a car moving ahead of him at 18 km hour^$$-$$1 is honking at a frequency of 1392 Hz. If the speed of sound is 343 m s^$$-$$1, the frequency of the honk as heard by him will be

1332 Hz

1372 Hz

1412 Hz

1454 Hz

AIPMT 2014

MCQ (Single Correct Answer)

-1

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

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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