More Classes
5th Class
6th Class
7th Class
8th Class
9th Class
10th Class
11th Class
12th Class
NAT I
NAT II
CSS
IQ
General Knowledge
MDCAT
ECAT
GAT General
GAT Subject
Other Links
Go to Home
Online Tests
ECAT Pre General Science Physics Chapter 8 Waves Online Test MCQs With Answers
Question # 1
If the mass of the simple pendulum becomes double, its time period
Choose an answer
increase
decreases
remains constant
none of them
Previous
Skip
Next
Question # 2
When sound waves travel from air to water which of these remains constant?
Choose an answer
Velocity
Frequency
Wavelength
All the above
Previous
Skip
Next
Question # 3
Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator
Choose an answer
greater than the frequency of applied force
equal to the frequency of applied force
less than the frequency of applied force
all of them
Previous
Skip
Next
Question # 4
Data transmitted along glass-fiber cables is in the form of pulses of monochromatic red light each of duration 2.5 ns. Which of the following is the best estimate of the number of wavelength in each pulse?
Choose an answer
10
3
10
6
10
9
10
12
Previous
Skip
Next
Question # 5
The velocity of sound at same temperature is maximum in
Choose an answer
H
2
N
2
O
2
NH
3
Previous
Skip
Next
Question # 6
When a mass 'm' is pulled slowly, the spring stretches by an amount x
0
,then the average force would be
Choose an answer
F= Kx
0
F=1/2Kx
0
F=2Kx
0
F=4Kx
0
Previous
Skip
Next
Question # 7
Si units of time period is
Choose an answer
second
hertz
revolution
vibration/sec
Previous
Skip
Next
Question # 8
Example of vibratory motion is
Choose an answer
mass suspended from a spring
a bob of simple pendulum
mass attached to a spring placed
all of them
Previous
Skip
Next
Question # 9
The time period of pendulums of different lengths would be
Choose an answer
same
different
both of them
none of them
Previous
Skip
Next
Question # 10
The distance covered by the wave during one period is called its:
Choose an answer
Wave number
Frequency
Wavelength
Time period
Previous
Skip
Next
Question # 11
Two sources of sound are said to be coherent if
Choose an answer
The produce sounds of equal intensity
They produce sounds of equal frequency
They produce sound waves vibrating with the same phase
They produce sound waves with zero or constant phase difference all instant of time
Previous
Skip
Next
Question # 12
If the time period a simple pendulum is 2 s, its frequency would be
Choose an answer
2 Hz
1.5 Hz
1.0 Hz
0.5 Hz
Previous
Skip
Next
Question # 13
Such oscillations in which the amplitude decreases steadily with time, are called
Choose an answer
resonance
force oscillations
large oscillations
damped oscillations
Previous
Skip
Next
Question # 14
If the external driving force is periodic with a period compareable to the natural period of the oscillator, then we get
Choose an answer
diffraction
beat
interference
resonance
Previous
Skip
Next
Question # 15
When the bob of simple pendulum is at extreme position, its K.E. will be
Choose an answer
maximum
minimum
zero
all of them
Previous
Skip
Next
Question # 16
The waves which propagate out in the space due to oscillations of electric and magnetic fields are called:
Choose an answer
Mechanical waves
Electromagnetic waves
Matter waves
All of them
Previous
Skip
Next
Question # 17
Waves transport energy
Choose an answer
without transport energy
with matter
both of them
none of them
Previous
Skip
Next
Back