Solve the variation problem.
-According to Ohm's law, the electric current, in amperes (A), in a circuit varies directly as the voltage, in volts (V). When 18 V are applied, the current is 2 A. What is the current when 25 V are applied?
A) 18. 25 A
B) 9 A
C) 2.78 A
D) 45 A

Question

Quizplus · Accepted Answer

Ohm's law states that current (I) varies directly with voltage (V), so I = kV, where k is a constant. With 18V and 2A, k = 2A/18V = 1/9. For 25V, I = (1/9) * 25V = 2.78A.

Solve the Variation Problem