An ideal electrical transformer has 500 turns on its primary coil and 50 turns on its secondary coil. If an alternating voltage of 240 V is applied to the primary coil, what is the output voltage from the secondary coil?
Answer and explanation
Correct answer: D. 24 V
Using the ideal transformer turns ratio equation: V_s / V_p = N_s / N_p. Rearranging gives V_s = V_p (N_s / N_p) = 240 V (50 / 500) = 240 * 0.10 = 24 V (a step-down transformer).
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