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General
Easy
Question
An automobile horn has a frequency n The horn is sounded continuously as the automobile is driven in the straight line with a velocity v past a stationary observer. The shortest distance between the automobile and the observer is x0 Which graph shown the correct variation of frequency heard by the observer. (C is the velocity of sound in air)
. 
The correct answer is:
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S1 & S2 are two coherent sources of sound having no initial phase difference. The velocity of sound is 330 m/s. No minima will be formed on the line passing through S2 and perpendicular to the line joining S1 and S2 , if the frequency of both the sources is:
S1 & S2 are two coherent sources of sound having no initial phase difference. The velocity of sound is 330 m/s. No minima will be formed on the line passing through S2 and perpendicular to the line joining S1 and S2 , if the frequency of both the sources is:
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Suppose that the compressions and reflections during propagation of a longitudinal sound wave in air 
constant. (Allgundergo a process which is neither isothermal nor adiabatic but obeys the law. symbols have their usual meanings with g = Cp /Cv ). the speed of the wave in terms of air temperature would be
Suppose that the compressions and reflections during propagation of a longitudinal sound wave in air constant. (Allgundergo a process which is neither isothermal nor adiabatic but obeys the law. symbols have their usual meanings with g = Cp /Cv ). the speed of the wave in terms of air temperature would be
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A string passing over a smooth pulley carries a stone at one end, while its other end is attached to a fixed end. A vibrating tuning fork is brought in contact with the stretched string and the string vibrates forming 8 loops. When the stone is completely immersed in water 10 loops are formed. The specific gravity of the stone is,
A string passing over a smooth pulley carries a stone at one end, while its other end is attached to a fixed end. A vibrating tuning fork is brought in contact with the stretched string and the string vibrates forming 8 loops. When the stone is completely immersed in water 10 loops are formed. The specific gravity of the stone is,
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When a harmonic wave is propagating through a medium, the displacement ‘y’ of a particle of the medium is represented by 
The time period will be
When a harmonic wave is propagating through a medium, the displacement ‘y’ of a particle of the medium is represented by The time period will be
physics-General
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Three capacitors are connected as shown in figure. Then the charge on C1 is 
Three capacitors are connected as shown in figure. Then the charge on C1 is
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In the circuit shown
In the circuit shown
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In the figure shown, the potential difference between points A and B is :
In the figure shown, the potential difference between points A and B is :
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The A.C. circuit shown in figure. Find the frequency of the AC voltage source so that current through the source will be in same phase as of voltage of source.
The A.C. circuit shown in figure. Find the frequency of the AC voltage source so that current through the source will be in same phase as of voltage of source.
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In the RLC series circuit shown, the readings of voltmeters are V1 = 150 V, V2 = 50 V and the source has emf 130 V
Values of VL and VC are respectively
In the RLC series circuit shown, the readings of voltmeters are V1 = 150 V, V2 = 50 V and the source has emf 130 V
Values of VL and VC are respectively
physics-General
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In the RLC series circuit shown, the readings of voltmeters are V1 = 150 V, V2 = 50 V and the source has emf 130 V
Find the power factor of the circuit
In the RLC series circuit shown, the readings of voltmeters are V1 = 150 V, V2 = 50 V and the source has emf 130 V
Find the power factor of the circuit
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The curve shows data taken in a driven RLC circuit experiment. The horizontal axis is the time axis. The solid curve represents the voltage. The dotted curve represents the current. Then
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The graph shows the current versus the voltage in a driven RLC circuit at a fixed frequency. The arrow indicates the direction that this is curve is drawn as time progresses. In this plot, the
The graph shows the current versus the voltage in a driven RLC circuit at a fixed frequency. The arrow indicates the direction that this is curve is drawn as time progresses. In this plot, the
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In the LC circuit above, the current is in the direction shown and the charges on the capacitor plates have the sign shown. At this time.
In the LC circuit above, the current is in the direction shown and the charges on the capacitor plates have the sign shown. At this time.
physics-General
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For the circuit shown in the figure, potential difference VB – VA is
For the circuit shown in the figure, potential difference VB – VA is
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If I = 80 mA, determine the magnitude of the current in the resistor
If I = 80 mA, determine the magnitude of the current in the resistor
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