Energy relates to power and current via P = VI and E = Pt

Steps:

• Convert time to seconds: t = 10 ms = 0.01 s.
• Calculate average power: P = E / t = 240 J / 0.01 s = 24,000 W.
• Use P = VI to find current: I = P / V = 24,000 W / 2000 V = 12 A.

Why C is correct:

• 12 A matches the calculation from E = VIt, where I = E / (V t) = 240 / (2000 × 0.01) = 12 A.

Why the others are wrong:

• A: 0.012 A results from forgetting to convert ms to s, yielding I = 240 / (2000 × 10) = 0.012 A.
• B: 1.2 A comes from miscalculating power as 2400 W instead of 24,000 W.
• D: 120 A arises from using t = 10 s instead of 0.01 s.

Final answer: C