College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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A doorbel uses a step-down transformer to cnvert standard US household voltageof 120V rms to an rms voltage of 20 V. The primary coil has 180 turns and has a rms current of 25mA. How many turns are in the secondary coil and what is its rms current?
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- The figure below shows an AC source, a transformer with a turns ratio of N₁/N₂ = 2.70, a source resistor Re, and a load resistor R₁. S' AVS R₂ ww ellee N₂ RL A voltmeter across the load resistor measures an rms voltage of 26.0 V when the load resistor R₁ is 48.0 and the rms source voltage is AV = 86.0 V. (a) Determine the value of the source resistor R (in ). How is the rms voltage across the secondary coil related to that of the primary? How is the power delivered to the primary related to the power delivered to the load resistor? How are the voltages across each element on the primary side related to each other? Q (b) What If? If the turns ratio is increased to 3.00, determine the source resistance (in 2) required to deliver the same amount of power to the load. X How can you modify your work from part (a) in order to determine the source resistance required to deliver the same amount of power to the load resistor as in part (a)?arrow_forwardA transformer has a primary coil with 225 turns of wire and a secondary coil with 1,800 turns. An AC power supply connected across the primary coil has a voltage given by the function Δv = (180 V)sin(ωt). What rms voltage (in V) is measured across the secondary coil?arrow_forwardNeeds Complete solution with 100 % accuracy.arrow_forward
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