0
\$\begingroup\$

Where should the ground be placed in a full wave bridge rectifier ? I mean if the ground was placed at one end of the load resistor, then won't the other diode (which would be forward biased in one cycle) that leaves from that point( point of contact of the resistor and ground) be cut off since that diode is not having a forward voltage of 0.7 volts ?

\$\endgroup\$
  • \$\begingroup\$ Briefly, no. You can put ground wherever you like. Voltage is relative. \$\endgroup\$ – uint128_t Feb 23 '16 at 7:49
  • \$\begingroup\$ Thanks for commenting. That was a new knowledge for me that u could put ground anywhere in the circuit. Thanks :) \$\endgroup\$ – ajk Feb 23 '16 at 8:41
2
\$\begingroup\$

You cannot have a common ground between input and output of a bridge rectifier (or you will short out diodes and Bad Things will happen).

So, ground either the input or the output or neither, depending on safety and other requirements, but never both.

|improve this answer|||||
\$\endgroup\$
  • \$\begingroup\$ Good answer. I really appreciate that answer. Thanks Spehro Pefhany :) \$\endgroup\$ – ajk Feb 23 '16 at 8:44
  • \$\begingroup\$ Agreed! I blew the circuit breaker in our part of the building by connecting the on-board ground with my laptop's ground via a programming header. Lesson learned! \$\endgroup\$ – slightlynybbled Feb 23 '16 at 8:45

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.