Q a Two DC ammeters with ratings 8 amps and with internal im

Q- a- Two DC ammeters with ratings 8 amps and with internal impedances of 0.1 + j 0.1 and 0.2 + j 0.2 ohms are parallel connected to measure a current of about 12 amps. Is it permissible to add the readings to get the circuit current?

b- Will the same approach work if these meters were AC meters and used to measure an AC current?

Solution

> SUPPOSE IF BOTH THE METERS ARE DC METERS THEN DIRECTLY ADD BOTH THE CURRENTS.

> SUPPOSE IF BOTH THE METERS ARE AC METERS THEN DID NOT ADD DIRECTLY. IN AC METERS ADDITION IS POSSIBLE ONLY THROUGH VECTORIALLY.