(1) From the following option, which option is correct for largest size transformer.?
a)1KVA,25Hz , b)1KVA,50HZ , c)1KVA,60Hz , d)1KVA,100Hz
Answer Posted / k.prakashchandra
Back emf is equal to 4.44 flux x frequency x turns . For the given voltage if the frequency is reduced , flux should be increased and hence the larger core or more number of turns
Is This Answer Correct ? | 10 Yes | 0 No |
Post New Answer View All Answers
who invented active elements? plz give me the complte details of active elements...
wHAT IS CAPACITANCE LATCHING? hOW TO CALCULATE CAPACITANCE LATCHING? hOW TO SOLVE THE PROBLEM IF CAPACITANCE LATCHING APPLIED?
WHAT IS FAULT CAPACITY OF HT MOTOR TERMINAL BLOCK? ANY BODY HAVE ANSWER PLZ....POST IT.
What is the difference IN MCCB's between thermal magnetic and electronic tripping system ?
Sir, My doubt on cable sizing calculation, Load:74 KW calculated cable 1 run 50mm2. Now client asking us to reduce cable size by increasing runs. Sir, My question now when my mind strikes with 2 options 1) Divide load 74/2 = 36 and calculate cable for 36+36 making it 2 runs or 2) Simply i can divide 50mm2 /2 ie. 2 runs of 25mm2 Please suggest me sir
What is cable tray, its type, and its support?
what is the voltage regulation for unity and zero power factor?
HOW TO WORK A VFD?SAY SIMPLE METHOD
What is shutdown of electrical sub station?
What is George phenomena to start the synchronus machine?
please tell me when we start motor without load in star or delta connection whose current above condition,pl write formula
Single line diagram for dbb (double bus bar)system.
can any one tell in easy method for circulating current ??
how dia of wire and angles are calculated for overhead shielding wire to protect substation equipment from lightening strokes???
IF I KNOW THE AREA OF CROSS SECTION OFTHE WIRE , WATTAGE OF THE LOAD ,VOLTAGE SUPPLY WHAT IM GIVING TO THE LOAD AND ALSO POWER FACTOR OF LOAD ....... SO GIVE ME FOR WHAT AMOUNT OF CURRENT I SHOULD USE WHICH TYPE OF CABLE?