2nd Edition

ISBN: 9780134601823

Author: ETKINA, Eugenia, Planinšič, G. (gorazd), Van Heuvelen, Alan

Publisher: Pearson,

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Textbook Question

Chapter 21, Problem 51P

A 9.0-V battery and switch are connected in series across the primary coil of a transformer. The secondary coil is connected to a lightbulb that operates on 120 V. Draw the circuit Describe in detail how you can get the bulb to light—not necessarily continuously.

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Chapter 21, Problem 50P

Chapter 21, Problem 52P

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S 1. Suppose the switch in the circuit at right is closed. 6V e a. How does closing the switch affect the AV from a to b? 12 2 6 2 30 2 d f b. How does closing the switch affect the current in the first two resistors? c. How does closing the switch affect the current through point g? d. Find the total resistance of the circuit before and after the switch is closed.

draw the circuit that corresponds to the case when the switch S is closed. Show the direction of the current through each of the resistors. Identify and label all of the junction in this circuit. Identify each of the closed loops associated with this circuit.

a) What is the time constant for the circuit shown in the figure below if the value of e = 12.0 V, R = 7.95 ohm, and L = 23.8 mH.? b) Suggest two ways in which we can decrease the time constant of this circuit. For each of the suggestions you just made, find the value of R and the value of L to reduce the time constant to 1 ms. c) Both the switches S1 and S2 are closed at t = 0. At t = 3.00 ms, the current has reached 85.2 % of its final value. Calculate the inductance (in mH). Submit the value of L you obtain in b) with the correct number of significant digits as your answer . You are required to show your work for a), b) and c) in the file you submit. Round off the final answers to the correct number of significant digits in all cases. NOTE: Canvas will assign you the full credit for this question if you submit the correct value of L in b) and vice-versa. Be aware that you will be assigned a final score after I look at your work for all the questions.

Chapter 21 Solutions

College Physics

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