15 questions
A wave is a physical phenomenon resulting from:
movement of a disturbance on an elastic medium
moving a material point on an elastic medium
sliding of a solid on an elastic medium
A wave is called transverse if:
the disturbance is parallel to the axis of propagation
the disturbance is perpendicular to the axis of propagation
the displacement of vibration is parallel to the axis of propagation
Sound is what type of wave?:
transverse
longitudinal
polarized
A wave is called periodic if:
disturbance is repeated in equal time intervals
disturbance is repeated in very long time intervals
disturbance is repeated in short time intervals
The wavelength is defined as:
the distance traveled by a progressive wave in a second
the distance traveled by a progressive wave in a period
the distance traveled by a progressive wave in a half period
The frequency of a wave is expressed as:
second ;
Hertz ;
meter
The electromagnetic wave is due to the spread of:
an electrical disturbance in a material medium
a magnetic disturbance in a material medium
an electromagnetic field
The speed of propagation of an electromagnetic wave in vacuum is:
3 x 10 6 m/s ;
3 x 10 8 m/s ;
3 x 10 8 km/s
If the frequency of an electromagnetic wave in vacuum is 600 kHz, its wavelength is equal to:
500 m ;
2000 m ;
5 km
A standing wave results from:
a superposition of two progressive waves of the same amplitude
a superposition of two progressive waves of the same frequency
a superposition of two progressive waves of different periods
If the frequency of the fundamental mode of a standing wave on a vibrating string with fixed ends is equal to 100 Hz, those of other modes of vibration are:
greater than 2 Hz ;
below 2 Hz;
equal to 2 Hz
For a linear harmonic oscillator whose total mechanical energy is constant, the elongation reaches its maximum when:
potential energy is equal to zero
kinetic energy is equal to zero
potential energy equals the kinetic energy
The vector acceleration of a particle in uniform circular motion is:
tangent to the circular path
carried by the radius of the circular path
is a zero vector
The angular momentum of a particle in uniform circular motion is:
directly proportional to the radius of the circular path
inversely proportional to the radius of the circular path
proportional to the square of the radius of the circular path
The potential energy of interaction between two static charges is:
proportional to the distance separating the two charges
inversely proportional to the distance separating the two charges
inversely proportional to the square of the distance separating the two charges