A 4000-Ω resistor is connected across a 220-V power source.What current will flow through the resistor?
A)0.055 A
B)1.8 A
C)5.5 A
D)18 A

Question

Quizplus · Accepted Answer

According to Ohm's Law, the current flowing through a resistor is directly proportional to the voltage across it and inversely proportional to its resistance. Therefore,

I = V/R

Substituting the given values, we get

I = 220 V / 4000 Ω

I = 0.055 A

Hence, the correct answer is choice A) 0.055 A.

A 4000-Ω Resistor Is Connected Across a 220-V Power Source