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11th Standard Physics Oscillations English Medium Free Online Test One Mark Questions 2020 - 2021

11th Standard

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Physics

Time : 00:20:00 Hrs
Total Marks : 20

    Answer all the questions

    20 x 1 = 20
  1. In a simple harmonic oscillation, the acceleration against displacement for one complete oscillation will be

    (a)

    an ellipse

    (b)

    a circle

    (c)

    a parabola

    (d)

    a straight line

  2. The length of a second’s pendulum on the surface of the Earth is 0.9 m. Th e length of the same pendulum on surface of planet X such that the acceleration of the planet X is n times greater than the Earth is

    (a)

    0.9n

    (b)

    \(\frac{0.9}{n}\)m

    (c)

    0.9n2m

    (d)

    \(\frac{0.9}{n^2}\)

  3. The time period for small vertical oscillations of block of mass m when the masses of the pulleys are negligible and spring constant k1 and k2 is

    (a)

    \(T=4\pi \sqrt { m\left( \frac { 1 }{ { k }_{ 1 } } +\frac { 1 }{ { k }_{ 2 } } \right) } \)

    (b)

    \(T=2\pi \sqrt { m\left( \frac { 1 }{ { k }_{ 1 } } +\frac { 1 }{ { k }_{ 2 } } \right) } \)

    (c)

    \(T=4\pi \sqrt { m\left( { k }_{ 1 }+{ k }_{ 2 } \right) } \)

    (d)

    \(T=2\pi \sqrt { m\left( { k }_{ 1 }+{ k }_{ 2 } \right) } \)

  4. An ideal spring of spring constant k, is suspended from the ceiling of a room and a block of mass M is fastened to its lower end. If the block is released when the spring is un-stretched, then the maximum extension in the spring is 

    (a)

    4\(\frac { Mg }{ k } \)

    (b)

    \(\frac { Mg }{ k } \)

    (c)

    2\(\frac { Mg }{ k } \)

    (d)

    \(\frac { Mg }{ 2k } \)

  5. A hollow sphere is filled with water. It is hung by a long thread. As the water flows out of a hole at the bottom, the period of oscillation will

    (a)

    first increase and then decrease

    (b)

    first decrease and then increase

    (c)

    increase continuously

    (d)

    decrease continuously

  6. When a damped harmonic oscillator completes 100 oscillations, its amplitude is reduced to \(\frac{1}{3}\)of its initial value. What will be its amplitude when it completes 200 oscillations?.

    (a)

    \(\frac{1}{5}\)

    (b)

    \(\frac{2}{3}\)

    (c)

    \(\frac{1}{6}\)

    (d)

    \(\frac{1}{9}\)

  7. A particle excites simple harmonic motion between x = -A & x = +A, the time taken for it to go from 0 to \(\frac{A}{2}\) is T1 & to go from \(\frac{A}{2}\) to A is T2 then

    (a)

    T1<T2

    (b)

    T1>T2

    (c)

    T1=T2

    (d)

    T1=2T2

  8. The simple harmonic motions are respresented by the equation. y1 = 0.1 sin (100πt + π/3) & Y2= 0.1 cos π the phase difference of the velocity of particle is

    (a)

    -\(\frac { \pi }{ 6 } \)

    (b)

    \(\frac { \pi }{ 3 } \)

    (c)

    -\(\frac { \pi }{ 6 } \)

    (d)

    \(\frac { \pi }{ 6 } \)

  9. The man velocity of a particle, executing simple harmonic motion with an amplitude 7 mm is 4.4 m s-1. The period of oscillation is

    (a)

    0.01 s

    (b)

    0.1 s

    (c)

    10 s

    (d)

    100 s

  10. A particle executing simple harmonic motion along y-axis has its motion described by the equation y = A.sin (ωt) + B, the amplitude of the example harmonic motion is

    (a)

    A

    (b)

    B

    (c)

    A+B

    (d)

    \(\sqrt{A+B}\)

  11. A particle is executing SHM at mid point of mean position & extermity. What is the potential energy in terms of total energy (E)

    (a)

    \(\frac{E}{4}\)

    (b)

    \(\frac{E}{16}\)

    (c)

    \(\frac{E}{2}\)

    (d)

    \(\frac{C}{8}\)

  12. What is time period of a pendulum hanged in a satellite? (T is time period on earth)

    (a)

    zero

    (b)

    T

    (c)

    infinite

    (d)

    \(\frac { T }{ \sqrt { 6 } } \)

  13. The magnitude of acceleration of particle executing SHM at the position of maximum displacement is

    (a)

    zero

    (b)

    minimum

    (c)

    maxmium

    (d)

    none of these

  14. Find the length of a simple pendulum whose period is 2.00 s.

    (a)

    2 m

    (b)

    0.4 m

    (c)

    0.1 m

    (d)

    3 m

  15. The three springs with force constant \({ k }_{ 1 }=7.5\frac { N }{ m } ,{ k }_{ 2 }=10.0\frac { N }{ m } ,{ k }_{ 3 }=12.5\frac { N }{ m } \), are connected in parallel to a mass of 0.500 kg. The mass is then pulled to the right and released. Then the period of the motion is.

    (a)

    0.6s

    (b)

    0.8s

    (c)

    0.5 s

    (d)

    004 s

  16. A particle executing a SHM has a maximum displacement of 2 cm its acceleration at a distance of 0.5 cm from its mean position is 2 cm/s2, What will be its velocity when it is at a distance of 1 cm from its mean position?

    (a)

    4 cm/s

    (b)

    2\(\sqrt{3}\)

    (c)

    11.2 cm/s

    (d)

    4\(\sqrt{7}\)

  17. The piston in the cylinder head of a locomotive has a stroke (twice the amplitude) of 1.0 m.1f the piston moves with S.H.M with an angular frequency of 200 rad/min. Then the maximum speed will be,

    (a)

    50 m/min

    (b)

    100m/min

    (c)

    150m/min

    (d)

    200 m/min

  18. Asmall body of mass 50 g is undergoing SHM of amplitude 100 em and period 0.2 s. What is the maximum value of the force acting on the body?

    (a)

    86.4 N

    (b)

    98.5 N

    (c)

    102.1 N

    (d)

    71.2 N

  19. In order to double the period of a simple pendulum _______.

    (a)

    its length should doubled

    (b)

    its length should be quadrupled

    (c)

    the mass of its bob should be doubled

    (d)

    the mass of its bob should be quadrupled.

  20. A particle is executing SHM. Then the graph of velocity as a function of displacement is _______.

    (a)

    straight line

    (b)

    circle

    (c)

    ellipse

    (d)

    hyperbola

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