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 120 V applied across a 24-ohm resistance, what is the current?
- A. 2 A
- ✓ 5 ACorrect
- C. 0.2 A
- D. 2880 A
Why B is correct
Using I = E/R (NEETS Mod. 1 §3-1): I = 120 V ÷ 24 Ω = 5 A. Option A results from dividing 24 by 12 rather than 120 by 24. Option C inverts the ratio. Option D is the product rather than the quotient.
Cited:NEETS Mod. 1 §3-1