Physics Current Electricity UHS 2022
PMDC Verified Question 51 of 112
How much potential drop exist across closed switch?
A
0 V
B
1 V
C
2 V
D
3 V
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 V
Concept:

An ideal closed switch acts as a perfect conductor with zero resistance.

Formula:

$$ V = IR $$

Solution:

  • For a closed switch, Resistance \( R = 0 \).


  • Therefore, regardless of current \( I \), the potential drop \( V = I \times 0 = 0 \text{ V} \).


Why other options are incorrect:

  • Opt B, C, D: A potential drop only occurs across components that present resistance to the flow of current.

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.

Previous Question All Current Electricity MCQs Next Question

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.

Enter Arena Sprint iOS App Android App