Calculating total losses of transformer in a test situation

pf> 1? (1.081)

despite that if you know efficiency don't you know losses?

why do homework here?

Before you try to calculate the efficiency you need to learn how to calculate the PF.

Clue : Its not "Pf = 1.081 (Vs/Vp)"

Why do homework here? ...... because I am a full time electrical engineering student as well as a single mom. Time is just not available to seek assistance at the college and this site was among my search results for answers.

Do you not wish to bolster students in your field?

Before you try to calculate the efficiency you need to learn how to calculate the PF.

Clue : Its not "Pf = 1.081 (Vs/Vp)"

According to my instructor Pf = W/VpIp so in this case Pf = 325W/117V x 2569mA. This is how I arrived at 1.081.

If you have any further information I would be glad to have your input.

Quote "Vp = 117V Vs = 228V Ip = 2569mA Is = 1250mA Pp = 325W

Pp = 301VA Ps = 285VA Eff.% = 94.8% Pf = 1.081 (Vs/Vp)"

VAp = Vp x Ip = 117 v x 2.57 amps = 300.7 VA not watts

VAs = Vs x Is = 228 v x 1.25 amps = 285 VA not watts

PF = watts/ VA

You do not have the value of watts. PF does not exceed the value of 1.0.

Watts maybe = to VA if PF = 1 but never greater than VA.

Drop the mA notation when you have these large values.

Pin *(100-Eff%) or Pout*((100/Eff%)-1)

Pin=Vin*Iin*Pfin Pout=Vout*Iout*Pfout