Physics Electronics PMDC Conceptual Practice
PMDC Verified Question 391 of 494
A sinusoidal AC voltage \( v(t) = 10 \sin(100\pi t)\text{ V} \) is applied across an ideal diode in series with a \( 100\text{ }\Omega \) load resistor. What is the peak forward load current?
A
\( 0.10\text{ A} \)
B
\( 0.07\text{ A} \)
C
\( 1.00\text{ A} \)
D
\( 0.20\text{ A} \)
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: \( 0.10\text{ A} \)
Concept:

For an ideal diode during forward conduction, internal diode drop is zero, and peak current is determined by peak input voltage and load resistance.

Formula:

$$I_{\text{peak}} = \frac{V_{\text{peak}}}{R_L}$$

Solution:

  • Given peak input voltage: \( V_{\text{peak}} = 10\text{ V} \).


  • Given load resistance: \( R_L = 100\text{ }\Omega \).


  • Using Ohm's law for the ideal conducting diode:


  • $$I_{\text{peak}} = \frac{10\text{ V}}{100\text{ }\Omega} = 0.10\text{ A}$$


Why other options are incorrect:

  • Option B: \( 0.07\text{ A} \) (\( \approx \frac{0.1}{\sqrt{2}} \)) corresponds to the RMS current, not the peak forward current.
  • Option C: \( 1.00\text{ A} \) is off by a factor of 10 from incorrect division.
  • Option D: \( 0.20\text{ A} \) would correspond to a \( 50\text{ }\Omega \) load rather than a \( 100\text{ }\Omega \) load.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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