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# Notes | EduRev

## NEET : Notes | EduRev

The document Notes | EduRev is a part of the NEET Course Physics 28 Years Past year papers for NEET/AIPMT Class 11.
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Q 1. Average velocity of a particle executing SHM in one complete vibration is:    [2019]
A: AÏ‰/2
B: AÏ‰
C:
D: Zero
Ans:
D
Solution:
In one complete vibration, displacement is zero. So, average velocity in one complete vibration

Q 2. The displacement of a particle executing simple harmonic motion is given by y = A0+ AsinÏ‰t + BcosÏ‰t
Then the amplitude of its oscillation is given by :    [2019]
A:
B:
C:
D: A + B
Ans:
B
Solution:

y = A0+ AsinÏ‰t + BsinÏ‰t
Equate SHM
y' = y â€“ A0 = AsinÏ‰t + BcosÏ‰t
Resultant amplitude

Q 3. The radius of circle, the period of revolution, initial position and sense of revolution are indicated in the fig.

y - projection of the radius vector of rotating particle P is:    [2019]
A: y(t) = â€“3 cos2Ï€t, where y in m
B:
C:
D:
Ans:
D
Solution:

At t = 0, y displacement is maximum, so equation will be cosine function.

T = 4s

y = a cosÏ‰t

Q 4. A pendulum is hung from the roof of a sufficiently high building and is moving freely to and fro like a simple harmonic oscillator. The acceleration of the bob of the pendulum is 20 m/s2 at a distance of 5 m from the mean position. The time period of oscillation is:-    [2018]
A: 2Ï€s
B: Ï€s
C: 2s
D: 1s
Ans:
B
Solution:

Q 5. A particle executes linear simple harmonic motion with an amplitude of 3 cm. When the particle is at 2 cm from the mean position, the magnitude of its velocity is equal to that of its acceleration. Then its time period in seconds is:-    [2017]
A:
B:
C:
D:
Ans:
B
Solution:

Q 6. A particle is executing SHM along a straight line. Its velocities at distances x1 and x2 from the mean position are V1 and V2, respectively. Its time period is:    [2015]
A:
B:

C:
D:
Ans: C
Solution:

Q 7. When two displacements represented by y1 = a sin(Ï‰t) and y2 = b cos(Ï‰t) are superimposed the motion is:    [2015]
A: simple harmonic with amplitude (a+b)/2
B: not a simple harmonic
C: simple harmonic with amplitude a/b
D: simple harmonic with amplitude
Ans:
D
Solution:

where  c2 = a2 + b2  [since  a+ b2 = c2 cos (Ï†) + csin (Ï†) = c2 ]

The superimposed motion is simple harmonic with amplitude

Q 8. The oscillation of a body on a smooth horizontal surface is represented by the equation,
X = A cos (Ï‰t)
Where X = displacement at time t
Ï‰ = frequency of oscillation
Which one of the following graphs shows correctly the variation â€˜aâ€™ with â€˜tâ€™?    [2014]
A:
B:
C:
D:

Here, a = acceleration at time â€˜tâ€™ and T = time period
Ans:
A
Solution:

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