MyCompetitiveExams Dynamic 180-question full-length simulator mixed dynamically from all 6 years for 2027 & 2026 aspirants.
In an ideal transformer, the turns ratio is Nₚ/Nₛ = 1/2. The ratio Vₛ : Vₚ is equal to (the symbols carry their usual meaning):
V_s / V_p = N_s / N_p = (N_p / N_s)⁻¹ = (1/2)⁻¹ = 2 / 1 = 2 : 1!
In an ideal transformer with negligible winding resistance and zero magnetic flux leakage, the same alternating magnetic flux Φ passes through each turn of both the primary and secondary coils. By Faraday’s law of electromagnetic induction:
Dividing the secondary voltage equation by the primary voltage equation gives the fundamental voltage transformation ratio:
We are given that N_p / N_s = 1 / 2. Inverting gives N_s / N_p = 2 / 1:
Diagnose every choice: Know exactly why the right option works and why distractors fail.
Applies only if N_p = N_s (isolation transformer).
Incorrectly squares the turns ratio.
Represents V_p : V_s instead of the asked V_s : V_p.
Exact ratio: V_s / V_p = N_s / N_p = 2 / 1.
The question gives N_p / N_s = 1/2, but asks for V_s : V_p. Over 25% of students hurriedly pick 1 : 2.
"Voltage ratio is directly equal to the turns ratio: V_s / V_p = N_s / N_p."
Test your speed and accuracy in the authentic 200-minute timed NTA simulator.
Spotted a mistake in this solution? Report an error ([email protected])
Cover all 1,140 official NEET questions in 285 days at your own pace. Progress is saved on your device. No login needed.