what is the meaning of rms value
Answer Posted / ram
consider a resistor of r ohms.give ac supply of v1 volts to
it for a time period of t seconds.due to the current
flowing through it the resistor will produce some heat q1
joules.
then the rms value of v1 is the dc voltage required to
produce q1 joules in the same time t seconds in the
resistor r ohm.
| Is This Answer Correct ? | 30 Yes | 8 No |
Post New Answer View All Answers
some time we open engine breaker 8.0 MW load but plant not trip. and another time engine open 4.0 MW load engine trip why? individually engine breaker open & individually emergency stop why difference?
if a 3phase 100kva distribution transformer , 400 v,50 hz, 4-wire system is loaded at 160 k.w mostly 1-phase Lighting & Airconditioning split a.c load what will be the net effect on the power system in terms of voltage, powerfactor, current , efficiency of xformer
What is the dc grounding system and what is diff between AC/DC grounding system?
Where is servomechanism used?
specify the inbuilt protections in DG
all interview questions with answers of ntpc (2000-2009
Why does the radius of armature is less than the radius of pole shoe?
What are the necessary solutions needed to be carried out on a malfunctioned earthing mechanism of a VACUUM CIRCUIT BREAKER.(TAMCO)
We have received supplies of the ordered material. payments against the supplies also released. Where ST paid 4% against form C. Meanwhile it has been observed that 25% of material supplied was defective. Please suggest whether the issuance of C form from our side would be stopped till settlement of liabilities.
Why does the speed regulating system adopting I controller have no steady-state error? In this single closed-loop speed regulating system, when the input of the I controller Un=0, what is the output voltage of the regulator? What factors do the output voltage depend on?
Why do we need interlocking in a HT metering or Ring main unit switchgear?
why capacitance effect is predominant in underground cable transmission and inductance effect is predominant in over head line transmission?
The gauge indicates the number of amps, but what about voltage? How voltage rating (for wire or fuse) determined?
hi Is there any possibilities to find out the rotation of a shaft or something else by using electromagnectic waves or by IR rays.If s then can v change the dir., of rotation of the same by remotely?& how? plz dn't any1 say "NO r CAN'T"
what are the specifications we must look at to select a relay for any capacity motor?