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In an ideal transformer, the ratio of primary voltage to secondary voltage equals the ratio of
Aprimary turns to secondary turns
Bprimary current to secondary current
Csecondary turns to primary turns
Dprimary power to secondary power
Answer & Solution
Correct answer: A. primary turns to secondary turns
1. For an ideal transformer V_p / V_s = N_p / N_s (same flux per turn).
2. Power is conserved so V_p I_p = V_s I_s, giving I_p / I_s = N_s / N_p (inverse).
3. Hence the voltage ratio equals N_p / N_s, the turns ratio.
_Source: Maharashtra Balbharati Std XII Physics, Ch 12 "Electromagnetic Induction" §12.8_
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