EM WAVES
Quiz by GARIMA UPADHYAY
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- Q1
Which of the following will deflect in the electric field?
X-rays
ultraviolet rays
cathode rays
-rays
30s - Q2
Waves in the decreasing order of their wavelengths are:
X-rays, infrared rays, visible rays,radiowaves
radiowaves, visible rays, infraredrays, X-rays
radiowaves, ultraviolet rays, visiblerays, X-rays
radiowaves, infrared rays, visible rays, X-rays
30s - Q3
High intensities of UV light
are low in energy
are hazardous to the eyes
kills dangerous bacteria and therefore good
is useful to good health
30s - Q4
The ratio of the amplitude of magnetic field to the amplitude of electric field for an electromagnetic wave propagating in a vacuum is equal to
the speed of light in vacuum
The ratio of magnetic permeability tothe electric susceptibility of vacuum
reciprocal of speed of light in vacuum
unity
30s - Q5
In general, the wavelength of microwaves is
less than that of infrared waves
more than that of infrared waves
more than that of radiowaves
less than that of ultra-violet waves
30s - Q6
Name the types of EM radiations which
i. are used in destroying cancer cells,
ii. cause tanning of the skin and
iii. maintain the earth's warmth.
and write about their production.
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