A sound source \(S\) is moving along a straight track with speed \(v ,\) and is emitting sound of frequency \(v_{0}\) (see figure). An observer is standing at a finite distance, at the point \(O ,\) from the track. The time variation of frequency heard by the observer is best represented by :
\(\left( t _{0}\right.\) represents the instant when the distance between the source and observer is minimum)
\(\left( t _{0}\right.\) represents the instant when the distance between the source and observer is minimum)
The Correct Option is D
Solution and Explanation
Top Questions on Waves
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Questions Asked in JEE Main exam
Considering Bohr’s atomic model for hydrogen atom :
(A) the energy of H atom in ground state is same as energy of He+ ion in its first excited state.
(B) the energy of H atom in ground state is same as that for Li++ ion in its second excited state.
(C) the energy of H atom in its ground state is same as that of He+ ion for its ground state.
(D) the energy of He+ ion in its first excited state is same as that for Li++ ion in its ground state.- JEE Main - 2025
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- To obtain the given truth table, the following logic gate should be placed at G
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- Logic gates
- Choose the correct logic circuit for the given truth table having inputs A and B.
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A slanted object AB is placed on one side of convex lens as shown in the diagram. The image is formed on the opposite side. Angle made by the image with principal axis is:
Concepts Used:
Waves
Waves are a disturbance through which the energy travels from one point to another. Most acquainted are surface waves that tour on the water, but sound, mild, and the movement of subatomic particles all exhibit wavelike properties. inside the most effective waves, the disturbance oscillates periodically (see periodic movement) with a set frequency and wavelength.
Types of Waves:
Transverse Waves -
Waves in which the medium moves at right angles to the direction of the wave.
Examples of transverse waves:
- Water waves (ripples of gravity waves, not sound through water)
- Light waves
- S-wave earthquake waves
- Stringed instruments
- Torsion wave
The high point of a transverse wave is a crest. The low part is a trough.
Longitudinal Wave -
A longitudinal wave has the movement of the particles in the medium in the same dimension as the direction of movement of the wave.
Examples of longitudinal waves:
- Sound waves
- P-type earthquake waves
- Compression wave