Two wires,A and B,and a variable resistor,R,are connected in series to a battery.Which one of the following results will occur if the resistance of R is increased?
A)The current through A and B will increase.
B)The voltage across A and B will increase.
C)The voltage across the entire circuit will increase.
D)The power used by the entire circuit will increase.
E)The current through the entire circuit will decrease.

Question

Quizplus · Accepted Answer

Increasing the resistance of R will increase the total resistance of the circuit. According to Ohm's law (I=V/R), an increase in resistance would result in a decrease in current, assuming the voltage from the battery remains constant. Therefore, the current through the entire circuit will decrease.

Two Wires,A and B,and a Variable Resistor,R,are Connected in Series