When a transformer is connected to 120-volt ac, it supplies 300 V to a device. The current through the secondary winding then is 0.06 A and the current through the primary is 2 A. The number of turns in the primary winding is 400. The number of turns in the secondary winding is:
Correct answer: B. 1000 turns
- A. 1200 turns
- B. 1000 turns
- C. 800 turns
- D. 600 turns
Explanation
To calculate the number of turns in the secondary winding, we can use the relationship between the voltage, current, and number of turns in a transformer:Formula:(Vs / Vp) = (Ns / Np)Where: Vs is the voltage in the secondary winding Vp is the voltage in the primary winding Ns is the number of turns in the secondary winding Np is the number of turns in the primary winding We are given: Vs = 300 V Vp = 120 V Np = 400 turns Is = 0.06 A Ip = 2 Substituting the values into the formula: (300 V / 120 V) = (Ns / 400 turns) Simplifying: 2.5 = (Ns / 400 turns) Solving for Ns: Ns = 2.5 * 400 turns = 1000 turnsTherefore, the number of turns in the secondary winding is 1000 turns.This is the correct answer, as calculated above.
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