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JEE 2020 Physics: Oscillations and waves Quiz 1 (20.08.2019)

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Question 1

In a test of subsonic Jet flies over head at an altitude of 100m. The sound intensity on the ground as the Jet passes overhead is 160 dB. At what altitude should the plane fly so that the ground noise is not greater than 120 dB.

Question 2

When two waves with same frequency and constant phase difference interfere,

Question 3

Sound waves from a tuning fork F reach a point P by two separate routes FAP and FBP (when FBP is greater than FAP by 12 cm there is silence at P). If the difference is 24 cm the sound becomes maximum at P but at 36 cm there is silence again and so on. If velocity of sound in air is 330 m/s, the least frequency of tuning fork is

Question 4

What is the number of beats per second will be heard if an observer is standing between two vehicles both moving at 8 m/s speed while one is approaching him the other is going away , if each vehicle blows a horn of 200 Hz frequency ?

Question 5

A car driver moving towards a wall with a velocity of 20 m/s emits a note of frequency 1.5 kHz. The frequency of note after reflection from the wall as heard by the car driver when the speed of sound in air is 330 m/s is,

Question 6

A student is performing the experiment of Resonance Column. The diameter of the column tube is 4 cm. The frequency of the tuning fork is 512 Hz. The air temperature is 38 ºC in which the speed of sound is 336 m/s. The zero of the meter scale coincides with the top end of the Resonance Column tube. When the first resonance occurs, the reading of the water level in the column is

Question 7

A block of mass is sliding on a fixed frictionless concave surface of radius . It is released from rest at point P which is at a height of from the lowest point Q. What is the time taken for the particle to reach from point P to the lowest point Q?

Question 8

Two masses m1 and m2 connected by a spring of spring constant k rest on a frictionless surface. If the masses are pulled apart and let go, the time period of oscillation is

Question 9

a bead of mass m is attached to the mid-point of a taut, weightless string of length l and placed on a frictionless horizontal table.

Under a small transverse displacement x, as shown, if the tension in the string is T, then the frequency of oscillation is

Question 10

Two springs of force constant k and 2k are connected to a mass shown in figure. The frequency of oscillation of the mass is
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Dec 19JEE & BITSAT