In a d.c current, the power is the product of voltage and current. This relati

In a d.c current, the power is the product of voltage and
current. This relationship does not always apply to
effective(r.m.s) values in an a.c circuit. Explain the
reason for this.

Question Posted / mani2089

2 Answers
6551 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

In a d.c current, the power is the product of voltage and current. This relationship does not alwa..

Answer / prosenjit majumder

In a DC circuit the power is the product of current and
voltage . Because in a DC circuit current and voltag
waveform always in a same phase . But in a AC circuit the
current and voltage may not be always in same phase .
Depending upon load (either inductive or capacitive ),
current and voltage waveform varies from each other. If
load is resistive then power is denoted by watt. If load is
capacitive or inductive then it is denoted by va .Here
power factor does matter .

Is This Answer Correct ?

5 Yes

4 No

In a d.c current, the power is the product of voltage and current. This relationship does not alwa..

Answer / loki

in dc average values of voltage and currents are always
constant.in ac instantaneous values differ from time to
time so we will take rms values

Is This Answer Correct ?

0 Yes

1 No

Post New Answer

More Electrical Engineering Interview Questions

what are iron and copper losses

4 Answers

What is mean by retrofitting of machine tool please brief.

1 Answers

plz send me the syllabus or any sample paper for engineer trainee recruitment if any,on ravinder911@yahoo.com

0 Answers Bhel, Maruti Suzuki,

why single core HT cable need only one side earthing?

2 Answers

What is the latest generation of circuit breakers called?

2 Answers Focus, Oil India,

will we have to design the UPS differently for both i.e. if we want to connect the two batteries in parallel and/or we want to connect the two batteries in series ?

4 Answers

What will happened if the neutral of secondary of Xformer ( Star point) Note it's above KVA rated Xformer

0 Answers Equate,

which safety we have to take when we go for work?

2 Answers

how synchronous condenser is used in place of synchronous generator with out negotiating IEEE standards? Can i use 3 generators as synchronous generators and 2 generators as a synchronous condensers in an IEEE 14 bus system with out disturbing the standards?

0 Answers

What will happened. if we feed 3phase supplay to the stater with out insert the rotor. How much current will flow through the stater winnding?

2 Answers

what is MFD value in capacitor?I have 201 Kva load & reactive power is 150 Kvar. so how it is calculated?

2 Answers IIT,

WHAT IS DIFFERENCE BETWEEN CAPACITOR AND CAPACITANCE?

0 Answers Manipal Hospital,

For more Electrical Engineering Interview Questions Click Here