At no load the PF of an alternator
-Zero
-Zero Lagging
-Zero leading
-None of the above
Answers were Sorted based on User's Feedback
Z transform is use when system is not a) converges b) diverges
what is the purpose of starter in tube light?what is it operation .
why power factor laggs and leads in case of inductance and capacitance??
What is error of a measurement?
can we use IGBT as a AC-DC converting device in the applications?
I have 2 transformers in two different plants, both are without OLTC but i am facing problem of voltage fluctuation at LV side from only one transformer. i have to change its taps manually twice in a day. Another transformer delivering voltage is ok. Please guide me about the problem
what is armature reaction?explain in simple words?and what is its infleunce on dc motor
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
when we design electrical schemes of 11/.415kv distribution..wen and were should we show the relays??what is the function of it?for example..we place EFR Relay CT between transformer neutral link and transformer earth.Like this what are the other type of relays we should use?why?where?Explain please..Thank you
how the length effects the ampacity of the cable? if a cable is carrying a current of 100A for 50m length then what will the effect on current if we double the length?
which of the folowing has negative temperature coefficient of resistance? a. mercury b. copper c. lead d. carbon
What is the problem, if a circuit breaker is not closing.