More turns on the secondary means a step up
transformer
Expect voltage to be higher and current to be lower on
secondary
If 100 volts AC are applied at the primary
what is the voltage at the secondary of this transformer
turns ratio is Np/Ns = 4/8 = 1/2
therefore the Vs = 2 x Vp = 2 x 100V =
200V
If 5 amp are input what current flows from
the secondary?
Its a step up so voltage goes up and the current goes down by the same
ratio as the turns
Therefore current out put
Is = 2.5A
If 500 w are input how much power is
output?
In an ideal transformer the power in is the
power out
therefore the power out Ps = 500 w
this can be confirmed with answers already
found
Is = 2.5A
Vs = 200V
P = IV = 2.5 A x 200V =
500 w = .5Kw
