Answer Posted / parthibanselvaraj
Phase is the wire that carries electrical current from
mains to the appliance via the switch.
neutral is the wire that completes the electrical circuit
from the switch back to the mains.
Ground is the wire that will act as a short circuit from
the body of the instrument to the earth ground.
now if the switch is open the current path can not be
completed and hence the appliance does not work.
the moment switch is pressed the path is completed and so
the appliance works properly. If some one touches the body
normally there should not be any problem.
If mains supply leaks to the body of the appliance it needs
to be immediately and automatically sent to the ground
bypassing the human load which may come into contact .
Earth line serves exactly this purpose. So if you touch you
will get very small leakage current through your body
because the entire current goes through ground wire. you
are safe.
| Is This Answer Correct ? | 56 Yes | 6 No |
Post New Answer View All Answers
Differentiate semiconductors, conductors and insulators on the basis of band gap.
What is the impact of 3GDT in SGSN?
Explain what are the two mechanisms of breakdown in a p-n junction?
wat you mean by harmonics? why you r using isolation transformer in digital ups or in normal means igbt ups?
charge at rest result in e.f and charge in motion result in m.f then how can an accelerated charge give rise to emf wave? then there should be no e.f due to acc charge as it rise from charge at rest?
What is the distance from an RF Transmitter that output power is determined?
Explain what is a differential amplifier?
plz send me the website of dmrc for previous questions papers
Explain capacitance?
What are the advantages and disadvantages of jfet over bjt?
power line carrier communication interview quetion
What is a scrambler? Explain its operation
why BTS use 48 dc volt
dmrc entrance exam papers
What are the losses that occur in a thyristor during working conditions?
