Physics Current Electricity BUMHS 2024
PMDC Verified Question 23 of 112
Let five resistors, each of 10 ohm, are connected in parallel and the combination is then connected with a battery of 50V. The current through each resistor will be:
A
5A
B
10A
C
25A
D
50A
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: 5A
Concept:

In a purely parallel circuit, every single branch is exposed to the exact full voltage of the source.

Formula:

$$ I = \frac{V}{R} $$

Solution:

  • Because they are in parallel, the potential difference across each resistor is exactly 50V.


  • We want the current through just ONE resistor, not the total circuit.


  • Applying Ohm's law to a single branch: \( I_{branch} = \frac{50 \text{ V}}{10 \, \Omega} = 5 \text{ A} \).


Why other options are incorrect:

  • Opt C: 25A is the total current drawn from the battery by all five branches combined (5A * 5 = 25A). The question asked for current through each resistor.


  • Opt B & D: Mathematical errors.

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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