Question

An ideal transformer is connected as shown below. If Vs = 83 V, N1 = 7, N2 = 2, and R = 294 , what is the magnitude of the resistor voltage drop VR (in V)? Vs N:N Points possible: 1 Allowed attempts: 3 Retry penalty: 33.333% Submit How much current does the source supply (IA, in A)? Points possible: 1 Allowed attempts: 3 Retry penalty: 33.333% Submit An ideal transformer is connected as shown below. The circuit parameters are the same as above; VS = 83 V, N1 = 7, N2 = 2, and R = 294 2. Note that the only change to the circuit is the secondary dot, which is effectively the same thing as swapping the secondary connections on the transformer in the previous questions. What is the magnitude of the resistor voltage drop VR (in V)? N:N Vs R Points possible: 1 Allowed attempts: 3 Retry penalty: 33.333% Submit How much current does the source supply (IA, in A)?

Answer 1

Solution IA + At elleer Vs Vs B IB N, N2 R Solution : [as per transformer Principle KvL along VAB = VS X N2 Ni the OXABO, ABTUR Path us= => Vs= US N2 TUR UR = Us ( 1 N 1) = 83 (A-2/4) - 159:285 volt. IB = 59.285 Amp = 0. 2016 Amp. 294 using Power balance, VstA= Up IB => 83XfA= 59.285x0.2016 =>HA 0.14399. Amp. Ami a

2nd question IA + AL لوووه relle Us TB CR VR3 294 KVL, US=UAB TUR => Us + Us x N2 = VR NI => Us (1+N2) = VR =>UR = 83 ( 1+ 2) = 106.71 volt. A 106.79 = 0.3629 Amp 294 Power balance, UstA= URIB NOW, IB => 83x FA - 106.72 x 0-3629 -> I A=0.466 Amp