Why we are using 250 ohm as a load for transmitter?

Field Instrumentation
1

reason for using 250 ohm as load in transmitter …

2

I= V/R R=250 OHM
V=1 TO 5 VOLT I= 1/250 I =.004A = 4 mA

I=5/250 I= .020 A= 20mA so current will very 4 to 20 mili ampare

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