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The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT. The peak value of electric field strength is :
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Related Questions
Diameter of plano-convex lens is 6 cm and thickness at the centre is 3 mm. If speed of light in material of lens is
$2×10_{8}m/s,$
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A train is moving on a straight track with speed
$20ms_{−1}$
. It is blowing its whistle at the frequency of 1000 Hz. The percentage change in the frequency heard by a person standing near the track as the train passes him is (speed of sound
$=320ms_{−1}$
) close to :
Let
$f_{K}(x)=k1 (s∈_{k}x+cos_{k}x)$
where
$x∈R$
and
$k≥1$
. Then
$f_{4}(x)−f_{6}(x)$
equals
In which of the following pairs of molecules/ions, both the species are not likely to exist?
Let
$[ϵ_{0}]$
denote the dimensional formula of the permittivity of vacuum. If M = mass, L = length, T = time and A = electric current, then:
For gaseous state, if most probable speed is denoated by
$C_{∗},$
average speed by C and mean square speed by
$C,$
then for a large number of molecules the ratios of these speeds are:
Let
$y(x)$
be the solution of the differential equation
$(xgx)dxdy +y=2xgx,(x≥1)$
Then
$y(e)$
is equal to :
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