GATE 2020 BM – Question 35
In the source’s artificial-pacing model, a single 100 mA pulse is delivered through 500 Ω tissue impedance. Delivered energy must not exceed 300 μJ. Find maximum pulse duration in μs.
Practise this question in The GATE Grind →
Show answer and explanation
Correct answer: 60 to 60
Explanation
Resistive pulse energy is I²Rt. With I=.1 A and R=500 Ω, power is .1²×500=5 W. The duration corresponding to 300 μJ is t=300×10⁻⁶/5=60×10⁻⁶ seconds=60 μs. This is the mathematical threshold given in the exam model.