Refer to the above figure. Consider a transformer. It has 2 separate windings, b
ID: 2305526 • Letter: R
Question
Refer to the above figure. Consider a transformer. It has 2 separate windings, but they share a common flux. The primary winding is 16 turns and the secondary winding is 8 turns.
Since the secondary winding is only 8 turns, it only sees half the flux that the primary winding generates. Assume that the primary coil carries an AC voltage of 240 V and a corresponding AC current of 2.0 A. Note that an AC voltage is one that varies sinusoidally and that has a maximum/minimum equal to the given value (240 volts in this case).
a. Given the ratio of fluxes between the 2 coils, and the fact that the secondary voltage must be equal to N2/N1*Vprimary, what must the secondary AC voltage be equal to?
Answer _________volts
b. Given that the power in watts is equal to the product of the voltage and the current and that you cannot gain power without putting it in from another source, what must the AC current be in the secondary windings?
Answer __________Amperes
Trans oner Ca varieS Sinvs.idq un ?iron Cove 2Explanation / Answer
(a) Secondary AC Voltage = 240 x ( N2 / N1 ) = 240 x (8/16 ) = 120 V Answer
(b) Applying Conservation Principle ( Assuming No losses)
Vs x Is = VP x IP
Therefore, Is = (240 / 120 ) x 2 = 4 A Answer