A60-hz single-phase transformer with capacity of 150 kva has the following parameters: rp = 0.35 ω rs = 0.002 ω rc = 5.2 kω xp = 0.5 ω xs = 0.008 ω xm = 1.1 kω the primary transformer voltage is 2.8 kv and the secondary is 230 v. the transformer is connected to a variable load (0 to 300 kw) with a lagging power factor of 0.83 and a load voltage equal to the rated transformer secondary. determine: (a) the total input impedance of the transformer when the secondary is shorted; and (b) the input current, voltage, power and power factor at full load (150 kw). (c) plot the voltage regulation versus load, and determine the load that produces 5% regulation.

think its the third option

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day

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