An electric generating plant produces electric
energy at a rate of 0.2 GW and a voltage of
60968 V.
If it is desired to transmit this power at
1.21936×105 V, what must be the turns ratio
of the transformer used?
015 (part 2 of 2) 10.0 points
What current would be sent out over the
power lines if it were transmitted at 1.21936×
105 V?
Answer in units of A.
Given in the question,
Power, P = 0.2 GW = 0.2*10^9 W = 2*10^8 W
Input potential difference, V1 = 60968 V
Output potential difference, V2 = 1.21936*10^5 V = 121936 V
(1) The turns ratio of the transformer used n1 / n2 = V2 / V1 = 121936 / 60968 = 2
(2) For the current would be sent out over the power lines if it were transmitted,
V2*I2 = V1*I1
The initial current in the primary coil,
I1 = P / V1 = 2*10^8 / 60968 = 3280.41 A
Using value of I1 and other values in the above equation,
121936*I2 = 60968*3280.41 => I2 = 1640.21 A
An electric generating plant produces electric energy at a rate of 0.2 GW and a voltage...
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