A step-down transformer is used for recharging the batteries of portable electronic devices. The turns ratio N,/N, for a particular transformer used in a DVD player is 1:15. When used with 120-V (rms) household service, the transformer draws an rms current of 24.0 mA from the house outlet. (a) Find the rms output voltage (in V) of the transformer. (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 85.0%, but the power delivered to the Blu-ray player remains the same?

A step-down transformer is used for recharging the batteries of portable electronic devices. The turns ratio N,/N, for a particular transformer used in a DVD player is 1:15. When used with 120-V (rms) household service, the transformer draws an rms current of 24.0 mA from the house outlet. (a) Find the rms output voltage (in V) of the transformer. (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 85.0%, but the power delivered to the Blu-ray player remains the same?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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A step-down transformer is used for recharging the batteries of portable electronic devices. Theturns ratio N2/N1 for a particular transformer used in a DVD player is 1:13. When used with 120 V (rms)household services, the transformer draws an rms current of 20.0 mA from the house outlet. Find (a) therms output voltage of the transformer and (b) the power delivered to the DVD player.
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