Foxoyo
Hey..!!
Practice
Select topics and difficulty and just practice mcqs.
Topics
Oscillations And Waves
Topics
Class 8
Science
Light
Physics
User (name or email)
Users
pick difficulty level
all
1
2
3
4
5
number of questions
10
30
50
70
100
Start
Let's practice 30 mcqs on
Oscillations And Waves
mcqs by everyone
The maximum velocity of a particle, executing simple harmonic motion with an amplitude 7 mm, is 4.4 m/s. the period of oscillation is
0.01 s
0.1 s
10 s
100 s
Two springs have force constants in the ratio 4 : 9. Their time periods are in the ratio of
1 : 3
3 : 2
2 : 3
3 : 1
A clock pendulum is adjusted for giving correct time inPatna.
This clock pendulum also gives correct time in
NONE OF THESE
Delhi
HYDERABAD
Kota
The bob of a simple pendulum is a spherical hollow ball filled withwater.
A plugged hole near the bottom of the oscillating bob gets suddenlyunplugged.
During observation, till water is coming out, the time period of oscillation would
first decrease and then increase to the original value
increase towards a saturation value
Remain unchanged
first increase and then decrease to the original value
What change in mass is required to double the frequency of a harmonic oscillator
The mass must be doubled.
The mass must be reduced to half its original value
The mass must be increased to four times its original value
The mass must be reduced to one-fourth its original value
The ratio of intensity of wave and energy density gives
Velocity
total energy
propagation constant
Momentum
The intensity ratio of two waves is 1 : 16. The ratio of their amplitudes is
1 : 4
2 : 1
4 : 1
1 : 16
The length of the seconds pendulum on the surface of Earth is 1 m. Its length on the surface of Moon, where g is 1 / 6 th the value of g on the surface of Earth, is
6 m
1 / 36 m
36 m
1 / 6 m
A particle executes SHM along a straight line so that its period is 12 s. The time it takes in traversing a distance equal to half its amplitude from its equilibrium position is
4 s
2 s
6 s
1 s
A child swinging on a swing in sitting position, stands up, then the time period of the swing will
Increase
increase if the child is long and decrease if the child is short
Decrease
remain same
Two particles executing SHM have time periods in ratio of 1:4. Both are given small displacements in the same direction at the sameinstant.
They will again be in phase at the mean position after the second particle has completed noscillations.
The value of n is
Zero
2
4
1/2
A solid copper sphere is suspended from a masslessspring.
The time period of oscillation of the system is 4 s. The sphere is now completely immersed in a liquid whose density is 1/8th that ofbrass.
The sphere remains in liquid duringoscillation.
Now the time period is
4 s
3 s
2 s
NONE OF THESE
In the case of SHM, at the time of maximum kinetic energy
potential energy is maximum
potential energy is minimum
potential energy must be zero
potential energy must not be zero
If a particle is acted by two simple harmonic motions simultaneously, the path of particle is
just like motion of a particle under gravity
Lissajous figure
None of the above
stream line motion
What fraction of the total energy is kinetic when the displacement is one-half of the amplitude
2/4
3/4
1/4
3.5/4
Two tuning forks when sounded simultaneously give one beat each 0.4second.
What is the difference of the frequencies
2.5 Hz
2 Hz
1.5 Hz
1 Hz
The time period of particle executing SHM is doubles, then
frequency becomes double
angular frequency becomes half
frequency becomes half
None of the above
A particle of mass 10 kg is executing SHM of time period 2 s and amplitude 0.25 m. The magnitude of maximum force on the particle is
24.65 N
40.6 N
5 N
Zero
The total energy of a particle executing SHM is proportional to
displacement from equilibrium position
square of amplitude of motion
frequency of oscillation
velocity in equilibrium position
The amplitude of a damped oscillator becomes one-half after tsecond.
If the amplitude becomes 1 / n after 3t second, then n is equal to
8
4
1/8
1/4
If the mass of bob of simple pendulum is increased by 50%, the time period of the pendulum
does not change
Increases
NONE OF THESE
Decreases
The time period of a mass suspended from a spring is 5 s. The spring is cut into four equal and the same mass is now suspended from one of itsparts.
The period is now
5 s
1.25 s
5 / 16 s
2.5 s
The maximum energy of a body executing SHM of amplitude 2 cm is
E. If the same body executes SHM of amplitude 3 cm but same period, the maximum energy will be
3/2E
2/3E
9/4E
E
In the case of SHM, if the particle is at the mean position, then the particle is in
unstable equilibrium
stable equilibrium
neutral equilibrium
NONE OF THESE
A weight suspended from a spring oscillates up anddown.
The acceleration of the weight is zero at
highest point
NONE OF THESE
middle point
lowest point
A seconds pendulum has time period 2 s. The spherical bob which is empty has mass of 50 g. This is replaced by another solid bob of same radius but having mass of 100 g. The new time period will be
4 s
1 s
2 s
8 s
Consider a stretched string under tension and fixed at bothends.
If the tension is doubled and the cross-sectional area halved, then the frequency becomes
Half
four times
Twice
eight times
The length of a seconds pendulum is approximately
99.3 mm
994 mm
9.93 mm
993 mm
The pendulum of lengths 121 cm and 100 cm startvibrating.
At some instant, the two are in the mean position in the samephase.
After how many vibrations of the shorter pendulum, the two will be in the same phase in the mean position
21 vibrations
10 vibrations
11 vibrations
20 vibrations
In simple harmonic motion, the particle is
always retarded
neither accelerated nor retarded
alternately accelerated and retarded
always accelerated
Learn
Correct Attempts
Score
00/00
in
00:00
Javascript is disabled
we serve best when javscript is enabled
Enable