USCG Exam PracticeAC circuits and theory
Ohm's law states that the current in a circuit is directly proportional to the applied voltage and inversely proportional to the resistance. If the voltage across a resistor is 120 V and the resistance is 40 ohms, what is the current?
- ✓ 3 ACorrect
- B. 4 A
- C. 0.33 A
- D. 480 A
Why A is correct
Applying I = E/R: I = 120 V / 40 Ω = 3 A. Option B results from dividing 120 by 30; option C inverts the ratio; option D multiplies rather than divides. (NEETS Mod. 1 §3-1)
Cited:NEETS Mod. 1 §3-1