For the same eel pulse, what is the total energy delivered during the pulse?

• A. 0.0345 J
• B. 3.45 J
• C. 0.345 J
• D. 0.00345 J

Answer: (C)

Total energy delivered during a pulse is found by integrating power over the pulse duration. For a purely resistive path, power at any moment is P = I^2 R = V^2/R, so the energy is E = ∫ P dt = ∫ I^2 R dt.

If the eel pulse keeps the same current I0 through resistance R for a duration Δt (a square-like pulse), then E = I0^2 R Δt. Since the problem uses the same pulse shape and duration, you plug the given I0, R, and Δt into this expression. Doing so gives E = 0.345 J, which matches the value selected.

Remember, if the pulse shape isn’t a square, you’d use E = ∫ I^2(t) R dt (or ∫ V^2(t)/R dt) with the appropriate shape factor. The other numerical options would arise from using different current, resistance, or duration values.