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What is the use of mc( moving coil) in dc voltmeter and dc ammter and what is the use of ( moving iron)in ac voltmeter nd ac ammeter
HCL,
Electrical Engineering 2346what is the need of starter in tube light and what type of starter is used in that?
Electrical Engineering 1503what happens to the supply voltage if there is any change in frequency?
1 Electrical Engineering 5641what is the difference between electrical and electronic choke.. and whats the main advantage of elecronic choke?
Electronics Communications 5405if it is possible for the air conditioner to maintain the temperature of 20 degree Celsius when the atmospheric temperature is 10 degree celsius
4 Mechanical Engineering 4626
What are the different protection systems takes place on
control panel board?
Answer
circuit breaker....and various relays..... [protective
relay,current relay, thermal relay..over load relay.. ]etc
| Is This Answer Correct ? | 5 Yes | 2 No |
Question { 10003 }
why contactors are used ...? is contactors and relays are
same ...?
Answer
electromagnectic core with winding are mainly used for NO
and NC connections which means making and braking of
circuit... we can split the flow of current by using
contactors...DC contactors and ac contactors are also
available.. it is used for high rating ... above 110v ac
and dc... But relays are also used for NO and NC changes
i.e making and breaking of circuits but especially for
remote or distant operation.. using 110 v ac supply..it
also consists of coil but absence of electromagnetic core..
there are several types of relays ..ex: industrial relay,
electromagnetic relay... etc
| Is This Answer Correct ? | 1 Yes | 0 No |
Question { 6954 }
what is an alternator & generator
Answer
alternator
| Is This Answer Correct ? | 1 Yes | 0 No |
Question { 3496 }
what is phase voltage phase current line current and their
usage? provide diagram
Answer
called phase current.
line current : The current flowing through the line is
called line current.
phase voltage : The voltage between the phase or a line to
the neutral is called phase voltage.
Line voltage : The voltage between the line to line is
called line voltage.. (R&B or Y&B or B&Y)... phase voltage
will be 230 v and line to line will be 440 v.. for single
or two phase specified voltage rating are used...
| Is This Answer Correct ? | 2 Yes | 3 No |
Question { 5529 }
which is dangerous AC or DC? If so why?
Answer
ac it has +ve and -ve and 0 point ... during the 0 point it
is possible to release from the shock...
| Is This Answer Correct ? | 4 Yes | 2 No |
