Answer / raj thakre

root mean square value

Answer / manoj

ROOT MEAN SQUARE VALUE is mathmatical term that apply only
for periodic functions. first we take square of given
function after this take mean of obtained function after
squaring , finally we take root of previous obtained value.
the term that is obtained now is known as rms value.

Answer / ravindra joshi

it is the value of ac current in which heat produced is
equal to the heat produced by dc current.

Answer / chetan langhani

heating effect of AC and DC become same at same time

Answer / venkatesan.j

It is the value of DC Component (Voltage or Current ) to
produce the same heat in a circuit in analogous to AC
Component( Voltage or Current).

Answer / gautham

“RMS” stands for root-meansquare.
It comes from a
mathematical formula that
calculates the “effective” value
(or heating value) of any ac
wave shape. In electrical terms,
the ac rms value is equivalent
to the dc heating value of a
particular waveform—voltage or
current. For example, if a resistive
heating element in an
electric furnace is rated at
15 kW of heat at 240 V ac rms,
then we would get the same
amount of heat if we applied
240 V of dc instead of ac.
Electrical power system
components such as fuses, bus
bars, conductors, and thermal
elements of circuit breakers are
rated in rms current because
their main limitation has to do
with heat dissipation. If we
want to check an electrical
circuit for overloading, we need
to measure the rms current and
compare the measured value to
the rated value for the component
in question.
If a current clamp is labeled
and specified to respond to the
true-rms value of current, it
means that the clamp’s internal
circuit calculates the heating
value according to the rms
formula. This method will give
the correct heating value
regardless of the current wave
shape.
Certain low-cost current
clamps which don’t have truerms
circuitry, use a short cut
method to find the rms value.
These meters are specified to
be “average responding-rms
indicating.” These meters
capture the rectified average of
an ac waveform and scale the
number by 1.1 to calculate the
rms value. In other words, the
value they display is not a
true value, but rather is a
calculated value based on an
assumption about the wave
shape. The average responding
method works for pure
sine waves but can lead to
large reading errors up to
40 percent, when a waveform
is distorted by nonlinear
loads such as adjustable
speed drives or computers.

Answer / pugal

DC rms value = AC voltage * 0.707

Answer / wrold&

You all are stupit who can not able to understand me what is RMS value.

Answer / simon

Effective value is There another name of rms value. It is There value of a.c in which same time is taken by d.c to produce heat.

Irms=0.707.Imax (virtual amp)
Erms=0.707.Emax (virtual volt)

Answer / anindya chitta bagchi

the square-root of the average of the squared magnitude of the
various values of a quantity is called the r.m.s. value of
that quantity.

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