EBK ELECTRIC CIRCUITS
EBK ELECTRIC CIRCUITS
10th Edition
ISBN: 8220100801792
Author: Riedel
Publisher: YUZU
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Question
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Chapter 7, Problem 1P

a)

To determine

Find the current values io(0) and io().

a)

Expert Solution
Check Mark

Answer to Problem 1P

The current values io(0) and io() are 0.5 A and 0 A respectively.

Explanation of Solution

PSPICE Circuit:

Refer to Figure P7.1 in the textbook.

Draw the given circuit diagram in PSPICE as shown in Figure 1.

EBK ELECTRIC CIRCUITS, Chapter 7, Problem 1P , additional homework tip  1

Simulation settings:

Provide the simulation settings as shown in Figure 2.

EBK ELECTRIC CIRCUITS, Chapter 7, Problem 1P , additional homework tip  2

PSPICE output:

After run the PSPICE circuit a black output screen will be displayed. Right click on the mouse by keeping cursor on the output screen, click the option “Add Trace” and type the expression “I(L1)” in trace expression box.

The current plot io(t) is shown in Figure 3.

EBK ELECTRIC CIRCUITS, Chapter 7, Problem 1P , additional homework tip  3

From PSPICE output, the initial and final value of output current is,

io(0)=500mA(or)0.5Aio()=0A

Conclusion:

Therefore, the current values io(0) and io() are 0.5 A and 0 A respectively.

b)

To determine

Find the expression io(t) for t0.

b)

Expert Solution
Check Mark

Answer to Problem 1P

The expression io(t) for t0 is 0.5e250tmA.

Explanation of Solution

Calculation:

Find the equivalent resistance after the switch is closed at t=0.

Req=12Ω+8Ω=20Ω

Find time constant from the circuit diagram.

τ=LReq

Here,

L is the inductance.

Req is the equivalent resistance across the load.

Substitute 20Ω for Req and 80 mH for L.

τ=80mH20Ω=80×10320ms=4ms

The expression io(t) is,

io(t)=io(0)etτ

Substitute 0A for io(), 0.5A for io(0), and 4ms for τ.

io(t)=0.5Aet4ms=0.5e250tA

Conclusion:

Therefore, the expression io(t) for t0 is 0.5e250tmA.

c)

To determine

Find the time taken to reach the output current of 100 mA after closed the switch.

c)

Expert Solution
Check Mark

Answer to Problem 1P

The time required to reach 100 mA of output current is 6.4 ms.

Explanation of Solution

Calculation:

The expression of output current io(t) for t0 is,

io(t)=0.5e250tA

Substitute 100 mA for io(t).

100mA=0.5e250tA0.1=0.5e250te250t=0.2t=6.4ms

Conclusion:

Therefore, the time required to reach 100 mA of output current is 6.4 ms.

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Chapter 7 Solutions

EBK ELECTRIC CIRCUITS

Ch. 7 - Prob. 1PCh. 7 - Prob. 2PCh. 7 - In the circuit shown in Fig. P 7.2, the switch...Ch. 7 - Prob. 4PCh. 7 - Prob. 5PCh. 7 - The two switches in the circuit seen in Fig. P...Ch. 7 - Prob. 7PCh. 7 - Prob. 8PCh. 7 - The switch shown in Fig. P 7.4 has been open for a...Ch. 7 - Prob. 10PCh. 7 - In the circuit in Fig. P 7.11, let Ig represent...Ch. 7 - Prob. 12PCh. 7 - Prob. 13PCh. 7 - Prob. 14PCh. 7 - Prob. 15PCh. 7 - Prob. 16PCh. 7 - Prob. 17PCh. 7 - For the circuit seen in Fig. P 7.19, find the...Ch. 7 - Prob. 19PCh. 7 - Prob. 20PCh. 7 - Prob. 21PCh. 7 - Prob. 22PCh. 7 - Prob. 23PCh. 7 - Prob. 24PCh. 7 - Prob. 25PCh. 7 - In the circuit shown in Fig. P 7.26, both switches...Ch. 7 - The switch in the circuit in Fig. P 7.25 is closed...Ch. 7 - Prob. 28PCh. 7 - Prob. 29PCh. 7 - Prob. 30PCh. 7 - The switch in the circuit seen in Fig. P 7.30 has...Ch. 7 - In Problem 7.30 how many microjoules of energy are...Ch. 7 - Prob. 33PCh. 7 - Prob. 35PCh. 7 - The switch in the circuit shown in Fig. P 7.38 has...Ch. 7 - Prob. 37PCh. 7 - Prob. 38PCh. 7 - Prob. 39PCh. 7 - Prob. 40PCh. 7 - Prob. 41PCh. 7 - Prob. 42PCh. 7 - Prob. 43PCh. 7 - Prob. 44PCh. 7 - Prob. 45PCh. 7 - Prob. 46PCh. 7 - Prob. 47PCh. 7 - For the circuit in Fig. P 7.4, find (in...Ch. 7 - Prob. 49PCh. 7 - Prob. 50PCh. 7 - Prob. 51PCh. 7 - Prob. 52PCh. 7 - The switch in the circuit of Fig. P 7.55 has been...Ch. 7 - Prob. 54PCh. 7 - The switch in the circuit seen in Fig. P 7.56 has...Ch. 7 - Prob. 56PCh. 7 - Prob. 57PCh. 7 - Prob. 58PCh. 7 - Prob. 59PCh. 7 - Prob. 60PCh. 7 - Prob. 61PCh. 7 - Prob. 62PCh. 7 - Prob. 64PCh. 7 - Prob. 65PCh. 7 - Prob. 66PCh. 7 - Prob. 67PCh. 7 - Prob. 68PCh. 7 - Prob. 69PCh. 7 - Prob. 70PCh. 7 - Prob. 71PCh. 7 - Prob. 72PCh. 7 - For the circuit in Fig. P 7.73, how many...Ch. 7 - Prob. 74PCh. 7 - Prob. 75PCh. 7 - Prob. 76PCh. 7 - Prob. 77PCh. 7 - Prob. 78PCh. 7 - Prob. 79PCh. 7 - Prob. 80PCh. 7 - Prob. 81PCh. 7 - Prob. 82PCh. 7 - Prob. 84PCh. 7 - Prob. 85PCh. 7 - Prob. 86PCh. 7 - Prob. 87PCh. 7 - Prob. 88PCh. 7 - Prob. 90PCh. 7 - Prob. 91PCh. 7 - Prob. 92PCh. 7 - Prob. 93PCh. 7 - Prob. 94PCh. 7 - Prob. 95PCh. 7 - Prob. 102PCh. 7 - Prob. 103PCh. 7 - Prob. 104PCh. 7 - Prob. 105PCh. 7 - Prob. 106PCh. 7 - Prob. 107P
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