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Worksheetselectromagnetic spectrum
Total questions: 20
Worksheet time: 10mins
A wavelength is the distance between any two corresponding points on an adjacent wave
True
False
Which type of UV has the highest hazard level?
UVB
UVC
UVA
Which of the following statement is false for the properties of electromagnetic waves?
Both electric and magnetic field vectors attain the maxima and minima at the same place and same time
The energy in electromagnetic wave is divided equally between electric and magnetic vectors
Both electric and magnetic field vectors are parallel to each and perpendicular to the direction to propagation of wave
These waves do not require any material medium for propagation
Red light differs from blue light as they have?
different frequencies and same wavelengths
same frequencies and different wavelengths
different frequencies and different wavelength
same frequencies and same wavelenghts
Properties of electromagnetic waves include?
speed.
frequency.
wavelength.
all of the above
When placed in sunlight, which of the following materials would absorb the most light energy?
a piece of clear plastic
a snowball
a shiny mirror
a black sweater
Which of the following are sources of electromagnetic waves on Earth?
sun
microwave ovens
x-ray machines
all of the above
This property of EM wave depend on the medium through which it is travelling?
velocity
frequency
wave length
time period
Phase difference is expressed in?
seconds
meters
meters per seconds
cycles
EM waves can be represented in the form of?
surface waves
longitudinal waves
transverse waves
sinusoidal waves
This property of EM wave is used for measuring distance in EDM?
wave length
phase difference
amplitude
frequency
What is the correct sequence for EDM propagation?
propagation, generation, reflection, reception
generation, reflection, reception, propagation
generation, propagation, reflection, reception
propagation, generation, reception, reflection
To which part of the spectrum does EM waves belong if the energy of the wave is of the order of 15 KeV?
Gamma rays
X rays
Infrared rays
Ultraviolet rays
The electromagnetic wave used to treat muscular pain is?
X-rays
VHF radiowaves
Infrared radiations
Ultraviolet rays
If a variable frequency ac source is connected to a capacitor then with decrease in frequency the displacement current will?
increase
remains constant
decrease
first decrease then increase
Which of the following electromagnetic waves has the longest wavelength?
Heat waves
Visible light
Radio frequency waves
Microwaves
Select wrong statement from the following:Electromagnetic waves
are transverse
travel with same speed in all media
travel with the speed of light
are produced by accelerating charge
The ratio of amplitude of magnetic field to the amplitude of electric field for an electromagnetic wave propagating in vacuum is equal to:
reciprocal of speed of light in vacuum
the ratio of magnetic permeability to the electric susceptibility of vacuum
unity
the speed of light in vacuum
The decreasing order of wavelength of infrared, microwave, ultraviolate and gamma rays is
Microwave, infrared, ultraviolet, gamma rays
Gamma rays, ultraviolet, infrared, microwaves
microwaves, gamma rays, infrared, ultraviolet
infrared, microwave, ultraviolet, gamma rays
Out of the following options which one can be used to produce a propagatingelectromagnetic wave?
A charge moving at constant velocity
A stationary charge
A chargeless particle
An accelerating charge
