Tutorials in Introductory Physics
1st Edition
ISBN: 9780130970695
Author: Peter S. Shaffer, Lillian C. McDermott
Publisher: Addison Wesley
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Textbook Question
Chapter 20.3, Problem 2aTH
Just after the switch is closed:
• what is the potential difference across bulb A,across bulb B, across the capacitor C, and across the battery? Explain.
• rank the currents
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Part A
The capacitor in the figure (Figure 1)begins to charge after the switch closes at t =0 s.
What is AV c a very long time after the switch has closed?
O 2. E
O 0
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• Part B
6
What is Qmar in terms of E. R and C?
να ΑΣφ
?
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Part C
In this circuit, does I=+dQ/dt or -dQ/dt?
O I= +dQ/dt
O I=-dQ/dt
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Part D
Figure
< 1 of 1
Find an expression for the current I at time t.
Express your answer in terms of some or all of the variables E, R, C, and t.
Closes at /= (0 s
R
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DC Voltmeters and Ammeters• Explain why a voltmeter must be connected in parallel with the circuit.• Draw a diagram showing an ammeter correctly connected in a circuit.• Describe how a galvanometer can be used as either a voltmeter or an ammeter.• Find the resistance that must be placed in series with a galvanometer to allow it to be used as a voltmeter with agiven reading.• Explain why measuring the voltage or current in a circuit can never be exact.
Question 1
For the circuit in the Figure EL2-1 below,
RT=
> R1
>1.0k
Ω
R9
510
3 R10
1300
1. Determine if the following statements are TRUE or FALSE. Write in the blank space T if the statement is TRUE or F if the statement is FALSE.
• Resistors R1 and R2 are in parallel. Answer:
• The current that flows through resistor R4 equals the sum of the currents through resistor R6 and resistor R7. Answer:
• The equivalent resistance of R3 and R8 is 168.2 Q. Answer:
• The voltage drop accross R6 and R7 is the same. Q. Answer:
• The equivalent resistance of R9 and R10 is 181 Q. Answer:
2. Determine the total equivalent resistor RT (shown in Figure EL2-2 below) of the circuit shown in Figure 1. Give your answer to 1 decimal place (1 d.p.)
R2
3.0k
3
R3
>8.20
7
R8
1600
2
R4
160
Figure EL2-1 - Resisitve DC circuit
Downloadable image
RT
R5
750
R6
820
>R7
>1500
Figure EL2-2 - Equivalent circuit to Figure EL1V2-1
Downloadable image
Chapter 20 Solutions
Tutorials in Introductory Physics
Ch. 20.1 - In tutorial, you compared the relative brightness...Ch. 20.1 - Use the model for electric current to rank the...Ch. 20.1 - Rang the brightness of the bulbs. Explain your...Ch. 20.1 - A wire is now added to the circuit as shown. i....Ch. 20.1 - Rank the networks according to their equivalent...Ch. 20.1 - How does adding a single bulb to a circuit in...Ch. 20.1 - How does adding a single bulb to a circuit in...Ch. 20.1 - The network AE above are connected, in turn, to...Ch. 20.1 - Rank the bulbs in order from brightest to dimmest....Ch. 20.1 - Suppose that a switch has been added to the...
Ch. 20.2 - The circuit at right consists of a bulb in series...Ch. 20.2 - The circuit at right consists of a bulb in series...Ch. 20.2 - The circuit at right consists of a bulb in series...Ch. 20.2 - In the circuit at right, the voltage across bulb 1...Ch. 20.2 - Prob. 2bTHCh. 20.2 - Box A and box B are now interchanged. It is...Ch. 20.2 - Consider the circuit as shown. i. Rank bulbs A, B,...Ch. 20.2 - b. A student cuts the write between bulbs A and C...Ch. 20.2 - Consider the following discussion between two...Ch. 20.2 - Rank bulbs 16 in order or brightness. Explain your...Ch. 20.2 - Rank the voltages across the bulbs. Explain your...Ch. 20.2 - Write an equation that relates the voltage across...Ch. 20.2 - Bulb 1 is removed from its socket. i. Does the...Ch. 20.3 - Describe the behavior of the bulb in the two...Ch. 20.3 - A second identical bulb is flow added to the...Ch. 20.3 - Just after the switch is closed: • what is the...Ch. 20.3 - A long time after the switch is closed: • rank the...Ch. 20.3 - Summarize your results by describing the behavior...
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