Q- In the process of checking AC through Phase Tester our
body is the part of circuit but we don't recevie Shock, Why ?
- 2 Answers
- 4562 Views
- I also Faced
- E-Mail Answers
Answer Posted / kunal singh dabi
A mains tester works because the potential difference
between the live and Earth makes a very small
(imperceptible) current flow through the tester and our
body to Earth. This current is just enough to light the
lamp / Neon. When you stick it in the Neutral socket, the
potential difference (just a volt or two, usually) is not
enough to give sufficient current to light the neon.When
the tester light glows, it mean electrons flow like,from
live terminal > tester > body > floor & walls of building >
inside the earth>goes back to the generator, via earth or
neutral conductor (Please note that somewhere, Neutral and
Earth are connected together so we have, in effect, a huge
loop of circuit.)
Above description is for AC supply only ( path complete
thorough earth or nutral to generator neutral), however
please note the fhilosophy is not applicable for DC supply
where - V is in floting condition (not grounded or earthed)
so due to un completation of that circuit tester light will
not glow.
| Is This Answer Correct ? | 6 Yes | 1 No |
Post New Answer View All Answers
Operational amplifiers
How will you calibrate PID controller? explain with example.
the whole paper was based on Transducers..questions like define repeatability, error,accuracy,precision..den there were many q. on the conversion of Pa to mmHg and other units.. also..der wer few Q. on some level sensors(with diagram)
what is interface level and how it is calibrate?
which type of signal used in instrument?
Why trim span ? How?
when placing a vent or drain hole on an orifice plate should you measure from the center of the bore up or down for the vent placement?
How signals can be taken through modbus?
what is the difference between magnetic flow meter and mass flowmeter
What is defferent betwen ESP &PCP PUMP .HOW IT IS WORK?
line up procedure for dp type flow transmitter?
In turbine what does term CDP, NI, NH, HSSOC means.
hello sir/madam, I,Subramanian need 5yrs placement papers of officer trainee of Instrumentation technology.pls send to this mail id mani_nxtgen@yahoo.co.in please do the needful. with regards, subramanian.v
Q1]IF THE RANGE FOR FLOW IS -35 TO 125 WHAT WILL BE THE SPAN FOR ABSOLUTE AND FOR NORMAL? Q2]HOW TO CALIBRATE CAPILLARY TYPE LT? Q3]HOW MANY ERROR CALCULATIONS ARE THERE USED IN PROCESS INDUSTRIES? Q4]HOW TO CALIBRATE TEMPERATURE TRANSMITTER? Q5] HOW TO CALIBRATE LEVEL TROLL AND HOW TO CONNECT? Q6]PLEASE TELL ME THE BASIC FOR INSTRUMENTATION WHICH IS APPLIED FOR CALIBRATION AND FOR ALL? PLEASE MAIL THE ANSWER TO honest_yes@yahoo.in
what is a good line as ic engineer as maintenance ,oc, project, calibration ,validation engineer?
