Recent questions tagged polarity

Description : Polarity Test of Transformer

Last Answer : Polarity Test of Transformer

Description : Why phasing out and polarity test is carried out on three phase transformer?

Last Answer : The phasing out test is carried out to identify the windings (primary and secondary) of corresponding phase of the three phase transformer. The polarity test is carried out to identify the ... identical polarity of the primary and secondary windings of each phase of the three phase transformer.

Description : What is the need of polarity marking in polyphase AC circuits?

Last Answer : Need of Polarity Marking in Polyphase AC Circuits: i) Polarity marking of terminals provides reference polarity for better understanding of system, even if the polarity of ac voltage changes ... of current transformers in relay protection circuit and getting desired performance is very difficult.

Description : To determine the polarity of the voltage drop across a resistor, it is necessary to know?

Last Answer : To determine the polarity of the voltage drop across a resistor, it is necessary to know direction of current through the resistor.

Last Answer : In D.C. generators the polarity of the interpoles is the same as that of the main pole ahead.

Description : In MOSFET, the polarity of the inversion layers is the same as that of?

Last Answer : In MOSFET, the polarity of the inversion layers is the same as that of majority carriers in the source.

Description : Do Zener diodes have polarity?

Last Answer : Yes, Zener diode have polarity Anode(+) and Cathode (-). And Zener Diode are connected into circuit with their cathode as positive terminal because they operate in reverse bias mode.