COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 21, Problem 11QAP
To determine
The reason for when the switch S is opened in the RL circuit, a spark jumps between the switch contacts
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For the circuit in fig.11.78
composed of standard values:
Determine the time constant.
Write the mathematical expression for the current It after the switch is closed
Repeat part (b) for VL and VR
Determine il and VL at one three- and five-time constants.
Sketch the waveforms of iL,VL and VR.
Consider a circuit with three resistors, R1 = 225 Ω, R2 = 155 Ω, and R3 = 135 Ω, connected in parallel with a 24.0-Vbattery. (These are the same resistances and battery as in the series circuit in Example 21-10.) Find (a) the total currentsupplied by the battery and (b) the current through each resistor.
The switch S in Figure 20.27 is closed at t = 0 and the currentat a reference time tref > 0 is Iref. If the circuit is changed asdescribed below and the switch is again closed at t = 0, determinewhether the current I at the same time tref would begreater than, less than, or equal to the original value of Iref.Indicate your answers with G, L, or E, respectively. (a) Boththe battery voltage ε and the resistance R are doubled. (b)The inductance L is doubled. (c) The battery voltage ε, theresistance R , and the inductance L are each doubled.
Chapter 21 Solutions
COLLEGE PHYSICS
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- Use Lenz’s law to explain why the initial current in the RL circuit of Figure 14.12(b) is aero.arrow_forwardThe current in the RL circuit shown below reaches half maximum value in l.75 ms after the switch S1is town. Determine (a) the tine constant of circuit and (b) the resistance of the circuit if L = 250 mH.arrow_forwardCheck Your Understanding When using Kirchhoff’s laws, you need to decide which loops to use and the direction of current flow through each loop. In analyzing the circuit in Example 10.7, the direction of current flow was chosen to be clockwise, from point a to point b. How would the results change if the direction of the current was chosen to be counterclockwise, from point b to point a?arrow_forward
- Apply the loop rule to loops abgefa and cbgedc in Figure 21.47.arrow_forwardThe current in the RL circuit shown here increases to 40% of its steady-state value in 2.0 s. What is the time constant of the circuit?arrow_forwardWhy is the power dissipated by a closed switch, such as in Figure 21.43, small?arrow_forward
- The switch S in Figure 20.27 is closed at t = 0 and the current at a reference time tref 0 is Iref. If the circuit is changed as, described below and the switch is again dosed at t = 0, determine whether the current I at the same time would be greater than, less than, or equal to the original value of Iref. Indicate your answers wilt G. L. or E, respectively. (a) Both the battery voltage and the resistance R are doubled. (b) The inductance L b doubled. (c) The battery voltage . the resistance R, and the inductance L are each doubled. Figure 20.27 A series RL circuit. As the current increases toward its maximum value, the inductor produces an emf that opposes the increasing current.arrow_forwardVerify that alter a time of 10.0 ms, the current for the situation considered in Example 23.9 will be 0.183 A as stated.arrow_forwardThe switch is closed in Figure 18.20. After a long time compared with the time constant, of the circuit, what will the current be in the 2- resistor? (a) 4 A (b) 3 A (c) 2 A (d) 1 A (c) More information is needed. Figure 18.20 (Quick Quiz 18.9)arrow_forward
- The switch S in Figure 20.27 is closed at t = 0 and the current at a reference time tref 0 is Iref. If the circuit is changed as, described below and the switch is again dosed at t = 0, determine whether the current I at the same time would be greater than, less than, or equal to the original value of Iref. Indicate your answers wilt G. L. or E, respectively. (a) Both the battery voltage and the resistance R are doubled. (b) The inductance L b doubled. (c) The battery voltage . the resistance R, and the inductance L are each doubled. Figure 20.27 A series RL circuit. As the current increases toward its maximum value, the inductor produces an emf that opposes the increasing current.arrow_forwardConsider the circuit in Figure 21.29 and assume the batter has no internal resistance. (i) Just after the switch is closed, what is the current in the battery? (a) 0 (b) /2R (c) 2/R (d) /R (e) impossible to determine (ii) After a very long time, what is the current in the battery? Choose from the same choices.arrow_forwardIf the power output in the previous problem is 1000 MW and line resistance is 2.00 (, what were the old and new line losses?arrow_forward
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What is Electromagnetic Induction? | Faraday's Laws and Lenz Law | iKen | iKen Edu | iKen App; Author: Iken Edu;https://www.youtube.com/watch?v=3HyORmBip-w;License: Standard YouTube License, CC-BY