Physics Electromagnetic Induction DUHS 2023
PMDC Verified Question 30 of 69
If a transformer has \( 500 \) turns on primary coil and \( 250 \) turns on secondary coil, then
A
Output voltage is half of input voltage
B
Output and input voltages are equal
C
Output voltage is double of input voltage
D
Output voltage is zero
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Output voltage is half of input voltage
Concept:

The voltage ratio perfectly mirrors the turns ratio in an ideal transformer.

Formula:

$$ \frac{V_s}{V_p} = \frac{N_s}{N_p} $$

Solution:

  • Given: Primary turns \( N_p = 500 \), Secondary turns \( N_s = 250 \).


  • Calculate the ratio: \( \frac{V_s}{V_p} = \frac{250}{500} = \frac{1}{2} \).


  • Therefore, \( V_s = \frac{1}{2} V_p \), meaning the output voltage is half of the input voltage (a step-down transformer).


Why other options are incorrect:

The output would only be double if the secondary had twice the turns of the primary. Equal voltage requires equal turns.

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 Electromagnetic Induction 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