dc has no frequency.....because dc wave is just a straight line...it doesn't vary with respect to time....but frequency is with respect to time change...hence its zero

Akash Pal

Aug 18th, 2013

dc is not pure dc it is just filtered dc so it has 1.2 hz frequency

chandan

Sep 5th, 2013

frequency is cycles per second of any wave here dc is constant so there is no meaning of frequency

akd

Sep 17th, 2013

As we know a.c signal has frequency but d.c has no frequency.

nagarjuna

Sep 19th, 2013

DC voltage frequency is always zero.

Manikandan

Dec 22nd, 2013

dc voltage waveform is linearly so freq.is 0.

Ravindra Reddy

Jan 5th, 2014

for DC current the frequency is always Zero

Biswajit

Jan 22nd, 2014

in AC we have different magnitude at different places , but if we will go for DC there is no change in magnitude, so that there will be no matter of cycle, so the value of frequency is zero

shivam gupta

Mar 19th, 2014

ITS ARBITARY. AND DEPENDS ON THE REQUIREMENT, SUPPOSE THERE IS A SIGNAL= 5+ 3*SIN(2*pi*t) ..... THEN WHAT IS THE FREQUENCY OR TIME PERIOD OF THIS SIGNAL?.....
answer- T.P for sinusoidal signal is 0.5 sec and for dc signal i.e 5 T.P= same as the sinusoidal wave means 0.5 sec
so T.P of this signal is 0.5 sec....
... (any rectification ur welcome..)

pandya jay

Jun 20th, 2014

o or i think 50hz.

vinay vishwakarma

Jul 1st, 2014

there is no freq. in dc vtg.

RITU

Jul 4th, 2014

0 HZ

chandan mukherjee

Sep 13th, 2014

there are two types of DC .
(I) steady state DC
(ii) pulsating DC the frequency of pulsating DC is 2 times of ac frequency
but the frequency of steady state dc is zero.

Mukesh Rathi

Sep 25th, 2014

Frequecy of dc is zero .

RAVI KANTH

Jul 28th, 2015

Some frequency is there because how to pass current one place to another place?

divya

Sep 4th, 2015

DC frequency is zero

baskar

Sep 5th, 2015

0 or no frequency

m mark

Nov 18th, 2015

Frequency is consistent

maheshkanna

Nov 25th, 2015

No frequency for DC supply.

anurag

Dec 14th, 2015

DC means direct current in which voltage/current doesnt change w.r.t time
So frequency is taken as zero

phani

Dec 22nd, 2015

There is no pure DC. Some frequency is available but it is negligible

Avinash

Mar 3rd, 2016

almost negligible

heinhtetaung

Mar 15th, 2016

No frequency in DC

ali raza

May 12th, 2016

DC voltage has no frequency, because DC wave is just a straight line It does not vary with respect to time, but frequency is with respect to time change, hence it is zero.

ali raza

May 20th, 2016

Pure DC has no frequency because its flux or wave in straight line note change with time so its frequency 0

Kanhaiya

May 22nd, 2016

Frequency is defined for DC quantity as it doesnt change w.r.t time. So, DC has no frequency. Writing DC has zero frequency is also not correct. Just write that frequency is not defined for DC

arun kumar

Jun 9th, 2016

DC frequency is zero

anjali ahirwar

Jul 30th, 2016

DC supply is always 0 because the main reason is there is no repetition pattern.

Raman kumar

Aug 1st, 2016

In case of AC, frequency is variable not constant
But in case of DC, frequency is constant.
It means value of DC system frequency may be 0hz, 4hz, etc.

Nagendra Swaero

Nov 22nd, 2016

We know that the frequency is inversely proportional to time period. DC forms a straight line, so there is no cycles and no time period. So there is no frequency.

Mahima solanki

Dec 25th, 2016

If we talk about pulsating or AC signals then it means some value of frequency but for DC it is 0 hz because the pulsating DC is when passed through filter it becomes pure DC and here we are talking about pure DC.. So its 0

Anup Kumar

Sep 13th, 2017

Zero

Gaj

Oct 30th, 2017

Frequency is no. of cycles per second i.e. rate of change w.r.t time. DC has constant amplitude it means no change w.r.t. time. So it has Zero frequency.

## DC Voltage Frequency

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