An alternating current is given by I = I₀ sin πt. Which equation describes a current with twice the frequency and twice the amplitude?

1. A Option A: I = 2I₀ sin(2πt)
2. B Option B: I = 2I₀ sin(πt/2)
3. C Option C: I = 2I sin πt
4. D Option D: I = I₀ sin(2πt)

Answer checked 11 October 2026 · How we write and check questions