Question 43
Electromagnetic InductionThe primary coil of a transformer has N turns and is connected to a 120 V a.c power line. If the secondary coil has 1,000 turns and a terminal voltage of 1,200 volts, what is the value of N?
- A.120
- B.100
- C.1,000
- D.1,200
Show the answer and explanation
Answer: B (100)
Explanation
Np/Ns = Vp/Vs: N/1000 = 120/1200, so N = 100.