A TV tube requires a 20.0 kV amplitude power supply. (a) What is the turns ratio

Question

A TV tube requires a 20.0 kV amplitude power supply. (a) What is the turns ratio of the transformerthat raises the 180 V amplitude householdvoltage to 20.0 kV?
1

(b) If the tube draws 83 W of power, findthe currents in the primary and secondary windings. Assume an idealtransformer.
I1 = 2 A
I2 = 3mA
A TV tube requires a 20.0 kV amplitude power supply. (a) What is the turns ratio of the transformerthat raises the 180 V amplitude householdvoltage to 20.0 kV?
1

(b) If the tube draws 83 W of power, findthe currents in the primary and secondary windings. Assume an idealtransformer.
I1 = 2 A
I2 = 3mA
(a) What is the turns ratio of the transformerthat raises the 180 V amplitude householdvoltage to 20.0 kV?
1

(b) If the tube draws 83 W of power, findthe currents in the primary and secondary windings. Assume an idealtransformer.
I1 = 2 A
I2 = 3mA

Explanation / Answer

Given that Vp = 180 V Vs = 20 x 103 V (a) Vp / Vs = 180 / 20 x 103 = 0.009 (b) I1 = P / Vp = 83 / 180 = 0.461 A      I2 = P / Vs = 83 / 20 x10-3 = 4.15 mA

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