★★ To reduce the 120. V AC voltage to 12.0 V AC to operate a standard doorbell, a step-down transformer is used. (Assume that 120. V is an rms voltage). (a) (b) This transformer has 1000 turns in the primary coil How many turns does it have in the secondary coil? When the doorbell button is pushed, 15.0 of resis tance is introduced in the secondary circuit. What are the values of the maximum and rms currents in the primary and secondary coils? Assume that the trans former used in the doorbell has 100% efficiency. (c) How would your answers to part (b) change if the efficiency of the transformer were 90%?

★★ To reduce the 120. V AC voltage to 12.0 V AC to operate a standard doorbell, a step-down transformer is used. (Assume that 120. V is an rms voltage). (a) (b) This transformer has 1000 turns in the primary coil How many turns does it have in the secondary coil? When the doorbell button is pushed, 15.0 of resis tance is introduced in the secondary circuit. What are the values of the maximum and rms currents in the primary and secondary coils? Assume that the trans former used in the doorbell has 100% efficiency. (c) How would your answers to part (b) change if the efficiency of the transformer were 90%?

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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