A sine wave is travelling in a medium. A particular particle has zero displacements at a certain instant. The particle closest to it having zero displacements is at a distance
(a) λ/4
(b) λ/3
(c) λ/2
(d) λ.
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Figure 10.1 shows a ray of light as it travels from medium A to medium B. Refractive index of the medium B relative to medium A is
(a) √3/√2 is the correct option
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An object experiences a net zero external unbalanced force. Is it possible for the object to be travelling with a non-zero velocity?
Yes. Even when an object experiences a net zero external unbalanced force, it is possible that the object is travelling with a non-zero velocity. This is possible only when the...
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The velocity of a particle is zero at t = 0. (a) The acceleration at t = 0 must be zero.
(b) The acceleration at t = 0 may be zero. (c) If the acceleration is zero from t = 0 to t - 10s speed is also zero in this interval. (d)...
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Which of the following equations represents a wave travelling along Y-axis?
(a) x = A sin (ky -ωt) EXPLANATION: In a transverse wave, the displacement of a particle is perpendicular to the direction of the wave motion. So the displacement of the particle...
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A wave pulse, travelling on a two -piece string, gets partially reflected and partially transmitted at the junction.
The correct answer is (c) λ`< λ EXPLANATION: Since the reflected wave is inverted, the pulse is traveling from the lighter string to heavier string. Hence the speed of the incident...
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Two sine waves travel in the same direction in a medium. The amplitude of each wave is A and the phase difference between the two waves is 120°.
The correct answer is (a) A EXPLANATION: The resultant amplitude y = A sin(⍵t-kx) + A sin(⍵t-kx+120°) →y = 2A Sin(⍵t-kx+60°)*cos60° →y = A sin(⍵t-kx+60°) Hence the resultant amplitude is A.
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A mechanical wave propagates in a medium along the X-axis. The particles of the medium
(c) may move on the X-axis (d) may move on the Y-axis. EXPLANATION: Mechanical waves are either transverse or longitudinal. In the transverse wave, the particles will move on Y-axis while in the...
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Two particles A and B have a phase difference of n when a sine wave passes through the region.
(b) A and B move in opposite directions. (d) The displacements at A and B have equal magnitudes. EXPLANATION: The frequencies of the particles will be the same, so the option (a) is...
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Light is (a) wave phenomenon (b) particle phenomenon (c) both particle and wave phenomenon.
(c) both particle and wave phenomenon. EXPLANATION: The photoelectric effect shows it as a particle phenomenon while the interference and diffraction of light shows it as a wave phenomenon. Hence duel...
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If the average value of a sine wave is 6 Volts, its effective value is
(a) 3.53 volts
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