Solve.
-If the resistance in an electrical circuit is held constant, the amount of current flowing through the circuit varies directly with the amount of voltage applied to the circuit. When 5 volts are applied to a circuit,
125 milliamperes of current flow through the circuit. Find the new current if the voltage is increased to 12 volts.
A) 325 milliamperes
B) 60 milliamperes
C) 288 milliamperes
D) 300 milliamperes

Question

Quizplus · Accepted Answer

The relationship is direct variation, so I = kV. Given I = 125 mA when V = 5 volts, k = 125/5 = 25. For V = 12 volts, I = 25 * 12 = 300 mA.

Solve. -If the Resistance in an Electrical Circuit Is Held Constant