Physics Current Electricity UHS 2022
PMDC Verified Question 52 of 112
A 3 V battery is connected in series with ammeter and 2 ohm resistance after short circuiting. What will be reading of ammeter?
A
1 A
B
1.5 A
C
5 A
D
6 A
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: 1.5 A
Concept:

"After short circuiting" implies any other parallel load was bypassed, leaving only the 2 \(\Omega\) resistor in series with the ideal ammeter across the battery.

Formula:

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

Solution:

  • Voltage \( V = 3 \text{ V} \).


  • Total circuit resistance \( R = 2 \, \Omega \) (assuming the ammeter is ideal and has 0 resistance).


  • Current \( I = \frac{3}{2} = 1.5 \text{ A} \).


  • The ammeter reads the total current, which is 1.5 A.


Why other options are incorrect:

  • Opt A, C, D: Simple math errors or applying incorrect formulas (like \( I = V \times R \)).

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