The voltage drop across a resistor is 4.0 V for a current of 1.0 A in the resistor. What is the current that will produce a voltage drop of 8.0 V across the resistor?
A) 0.33 A
B) 1 A
C) 2 A
D) 0.50 A

Question

Quizplus · Accepted Answer

According to Ohm's Law, the voltage drop across a resistor is directly proportional to the current passing through it. Thus, the resistance of the resistor must be constant in this scenario. Using the given information, we can calculate the resistance of the resistor:
R = V/I = 4.0 V / 1.0 A = 4.0 Ω
To find the current that will produce a voltage drop of 8.0 V, we can again apply Ohm's Law:
I = V/R = 8.0 V / 4.0 Ω = 2.0 A
Therefore, the answer is choice C, 2 A.

The Voltage Drop Across a Resistor Is 4