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 a circuit has a resistance of 10 ohms and an applied voltage of 120 V, what is the current?
- ✓ 12 ACorrect
- B. 1,200 A
- C. 0.083 A
- D. 1.2 A
Why A is correct
Applying I = E/R: I = 120 V / 10 Ω = 12 A. Dividing voltage by resistance, not multiplying, gives current; the other options result from arithmetic errors in applying the formula.
Cited:NEETS Mod. 1 §3-1