When used to adjust the supply voltage, the variable resistor is referred to as a __________ ― characteristically a 3-terminal device.
When used to control the available connected-load current, the variable resistor is referred to as a __________ ― characteristically a 2-terminal device.
A) potentiometer; potentiometer
B) potentiometer; rheostat
C) rheostat; rheostat
D) rheostat; potentiometer
Share your understanding of this question with the correct explanation.