A step-down transformer is used for recharging the batteries of portable electronic devices. The turns ratio N₂/N₁ for a particular transformer used in a DVD player is 1:10. When used with 120-V (rms) household service, the transformer draws an rms current of 27.0 mA from the house outlet. (a) Find the rms output voltage (in V) of the transformer. V (b) Find the power (in W) delivered to the DVD player. w (c) What If? What would be the current (in mA) drawn from the house outlet if the transformer had an efficiency of 94.0%, but the power delivered to the Blu-ray player remains the same? mA

A step-down transformer is used for recharging the batteries of portable electronic devices. The turns ratio N₂/N₁ for a particular transformer used in a DVD player is 1:10. When used with 120-V (rms) household service, the transformer draws an rms current of 27.0 mA from the house outlet. (a) Find the rms output voltage (in V) of the transformer. V (b) Find the power (in W) delivered to the DVD player. w (c) What If? What would be the current (in mA) drawn from the house outlet if the transformer had an efficiency of 94.0%, but the power delivered to the Blu-ray player remains the same? mA

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter21: Alternating-Current Circuits And Electromagnetic Waves

Section: Chapter Questions

Problem 44P: A step-down transformer is used for recharging the batteries of portable devices. The turns ratio...

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