Oscillations CBSE Questions & Answers

Oscillations

This is Physics Class 11 Oscillations CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
The pendulum of a wall clock executes
  • A
    a rotary motion
  • B
    a random motion
  • C
    an oscillatory motion
    Correct
  • D
    a translatory motion
2
Oscillatory motion is
  • A
    periodic to and fro motion
    Correct
  • B
    combination of translation and rotation
  • C
    rotation about a point
  • D
    a periodic to and fro motion
3
Periodic motion is
  • A
    motion that involves coming to a mean position at random intervals of time
  • B
    motion that repeats itself at irregular intervals of time
  • C
    motion that does not repeat itself at regular intervals of time
  • D
    motion that repeats itself at regular intervals of time
    Correct
4
Period of a periodic motion is
  • A
    the largest interval of time after which the motion is repeated
  • B
    the average interval of time after which the motion is repeated
  • C
    the mean interval of time after which the motion is not repeated
  • D
    the smallest interval of time after which the motion is repeated
    Correct
5
Frequency of the periodic motion is
  • A
    twice the reciprocal of the period
  • B
    thrice the reciprocal of the period
  • C
    the reciprocal of the period
    Correct
  • D
    half the reciprocal of the period
6
for any periodic motion with a period T and displacement = \({\rm{f}}\left( {\rm{t}} \right)\)
  • A
    f (t) = f (t+3T )
  • B
    f (t) = f (t+5T )
  • C
    f (t) = f (t+T )
    Correct
  • D
    f (t) = f (t+2T )
7
Any periodic function can be expressed as a.
  • A
    superposition of polynomial functions of different time periods with suitable coefficients
  • B
    superposition of exponential functions of real time periods with suitable coefficients
  • C
    superposition of sine and cosine functions of same time period with suitable coefficients
  • D
    superposition of sine and cosine functions of different time periods with suitable coefficients
    Correct
8
Simple harmonic motion is motion represented by
  • A
    x (t) = A exp (\(\omega {\rm{t}}\) + \(\varphi \))
  • B
    x (t) = A (\(\omega {\rm{t}}\) + \(\varphi \))
  • C
    x (t) = A cos (\(\omega {\rm{t}}\) + \(\varphi \))
    Correct
  • D
    x (t) = A log (\(\omega {\rm{t}}\) + \(\varphi \))
9
Simple harmonic motion is the projection of
  • A
    uniform circular motion on a diameter of the circle in which the latter motion takes place
    Correct
  • B
    uniform circular motion on a chord of the circle in which the latter motion takes place
  • C
    non uniform circular motion on a diameter of the circle in which the latter motion takes place
  • D
    non uniform circular motion on a chord of the circle in which the latter motion takes place
10
for a particle executing simple harmonic motion represented by x (t) = A cos (\(\omega {\rm{t}}\) + \(\varphi \)) velocity v(t) is given by
  • A
    v (t) = -A sin (\(\omega {\rm{t}}\) + \(\varphi \))
  • B
    v (t) = - \(\omega {\rm{A}}\) cos (\(\omega {\rm{t}}\) + \(\varphi \))
  • C
    v (t) = - \(\omega {\rm{A}}\) log (\(\omega {\rm{t}}\) + \(\varphi \))
  • D
    v (t) = - \(\omega {\rm{A}}\) sin (\(\omega {\rm{t}}\) + \(\varphi \))
    Correct
11
For a particle executing simple harmonic motion represented by x (t) = A cos (\(\omega {\rm{t}}\) + \(\varphi \)) acceleration a(t) is given by
  • A
    a(t) = - \(\omega \)x(t)
  • B
    a(t) = - 2 \({\omega ^{\rm{2}}}\)x(t)
  • C
    a(t) = - 2\(\omega \)x(t)
  • D
    a(t) = - \({\omega ^{\rm{2}}}\)x(t)
    Correct
12
For a particle of mass m executing simple harmonic motion represented by x (t) = A cos (\(\omega {\rm{t }} + {\rm{ }}\varphi \)) and a restoring force F= -kx, the natural frequency is given by
  • A
    \(\omega \) = \(\sqrt {{k \over m}} \)
    Correct
  • B
    \(\omega \) = \(\sqrt {{{3k} \over m}} \)
  • C
    \(\omega \) = \(\sqrt {{k \over {2m}}} \)
  • D
    \(\omega \) = \(\sqrt {{{2k} \over m}} \)
13
The spring force F = –kx is a conservative force, with associated potential energy
  • A
    U(x) = \({1 \over 2}\) \({\rm{k}}{{\rm{x}}^{\rm{2}}}\)
    Correct
  • B
    U(x) = \({\rm{k}}{{\rm{x}}^{\rm{2}}}\)
  • C
    U(x) = \({3 \over 2}\) \({\rm{k}}{{\rm{x}}^{\rm{2}}}\)
  • D
    U(x) = \({5 \over 2}\) \({\rm{k}}{{\rm{x}}^{\rm{2}}}\)
14
The total mechanical energy of a harmonic oscillator
  • A
    increases quadratically with time
  • B
    increases linearly with time
  • C
    is independent of time
    Correct
  • D
    decreases linearly with time
15
The time period T of a spring mass system of mass m and spring constant k is given by
  • A
    T = \(\pi \) \(\sqrt {{m \over k}} \)
  • B
    T = 2\(\sqrt {{m \over k}} \)
  • C
    T = 4 \(\pi \) \(\sqrt {{m \over k}} \)
  • D
    T = 2 \(\pi \) \(\sqrt {{m \over k}} \)
    Correct