The purpose of a rheostat in a circuit is to
A. increase the potential difference supplied by the battery
B. decrease the magnitude of current only
C. increase or decrease the resistivity of the resistors
D. change the current in the circuit by changing the resistance
Answer:D
The purpose of a rheostat in a circuit is to
A. increase the potential difference supplied by the battery B. decrease the magnitude of current only C. increase or decrease the resistivity of the resistors D. change the current in the circuit by changing the resistance