Circuit with Internal Resistance · PhysicsBowl 2018 #18
Physics · electromagnetism
Problem
The circuit shown contains a battery with an internal resistance, r connected to a variable resistor. When the resistance of the variable resistor is increased, which of the following statements is true? [Figure: Circuit with battery having internal resistance r]
(A) The terminal voltage increases.
(B) The current through the variable resistor in the circuit increases.
(C) The power dissipated by the internal resistance increases.
(D) The potential difference across the variable resistor decreases.
(E) None of the above statements are true.