Essential University Physics
4th Edition
ISBN: 9780134988566
Author: Wolfson, Richard
Publisher: Pearson Education,
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Textbook Question
Chapter 25.2, Problem 25.2GI
Rank front highest to lowest the voltages across the identical resistors R at the top of each circuit shown, and give the actual voltage for each. In (a) the second resistor has the same resistance R, and in (b) the gap is an open circuit (infinite resistance).
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Figure given below displays two circuits with a charged capacitor that is to be discharged
through a resistor when a switch is closed. In figure(a), R1 = 16 Q and C1= 8 µF. In figure(b), R2
= 12 Q and C2 = 9 µF. The ratio of the initial charges on the two capacitors is q 02 /g01 = 10/2.
At time t = 0, both switches are closed. At what time t do the two capacitors have the same
charge? (Your result must be in multiples of 10 -4 s and include 2 digit after the decimal point.
That means if you get a result of a 9.22 x 10 -4 just type 9.22 in the answer box. Maximum of 5%
of error is accepted in your answer.)
Total resistance in a parallel circuit is less than your smallest resistor. The reason for this prob is that the total resistance has to divide, (or) split up. Can you help me to conceptualize this, which would get into the difference between parallel versus series circuit.
Problem 5.
In the circuit shown in the figure all resistors are 5 ohm
resistors and the source EMF is 12 volts.
(a) Calculate the equivalent resistance of the circuit below when the switch is
(1) орen
(2) closed.
(b) Calculate the Power in R5 and the current in R4 if the switch is
(1) Open
(2) Closed
R1
S1
R2
R3
R5
R4
Chapter 25 Solutions
Essential University Physics
Ch. 25.1 - The figure shows three circuits. Which are...Ch. 25.2 - Rank front highest to lowest the voltages across...Ch. 25.2 - The figure shows all four possible combinations of...Ch. 25.2 - The figure shows a circuit with three identical...Ch. 25.3 - Which circuit(s) cannot be analyzed using series...Ch. 25.4 - All resistors in the figure have the same value...Ch. 25.5 - A capacitor is charged to 12 V and then connected...Ch. 25 - Are household electrical outlets connected in...Ch. 25 - Can the voltage across a batterys terminals differ...Ch. 25 - Can the voltage across a batterys terminals he...
Ch. 25 - When the switch in Fig. 25.25 is open, whats the...Ch. 25 - Two identical resistors in series dissipate equal...Ch. 25 - When a large electric load such as a washing...Ch. 25 - How would you connect a pair of equal resistors...Ch. 25 - You have a battery whose voltage and internal...Ch. 25 - A student whos confused about voltage and current...Ch. 25 - A student whos confused about voltage and current...Ch. 25 - Sketch a circuit diagram for a circuit that...Ch. 25 - Sketch a diagram for a circuit consisting of two...Ch. 25 - Resistors R1 and R2 are in series, and the series...Ch. 25 - Whats the emf of a battery that delivers 27 J of...Ch. 25 - A 1.5-V battery stores 4.5 kJ of energy. How long...Ch. 25 - If you accidentally leave your car headlights...Ch. 25 - A 47-k resistor and a 39-k resistor are in...Ch. 25 - What resistance should you place in parallel with...Ch. 25 - A defective starter motor draws 285 A from a car's...Ch. 25 - Find the internal resistance of the battery in...Ch. 25 - When a 9-V battery is temporarily short-circuited,...Ch. 25 - You have a 1.0-, a 2.0-, and a 3.0- resistor. What...Ch. 25 - Find all three currents in the circuit of Fig....Ch. 25 - Prob. 24ECh. 25 - Find all three currents in the circuit of Fig....Ch. 25 - Prob. 26ECh. 25 - An ammeter with 100- resistance is inserted in the...Ch. 25 - A new mechanic foolishly connects an ammeter with...Ch. 25 - Show that the quantity RC has the units of time...Ch. 25 - If capacitance is in F, what will he the units of...Ch. 25 - Show that a capacitor is charged to approximately...Ch. 25 - An uncharged 10-F capacitor and a 470-k resistor...Ch. 25 - Find an expression for the voltage across the...Ch. 25 - Rework Example 25.3. changing the 4.0- Ω resistor...Ch. 25 - Example 25.3: In the circuit of Example 25.3, take...Ch. 25 - Example 25.3: In Fig. 25.27, take R1 = R2 = 33.0 Ω...Ch. 25 - Example 25.3 In Fig. 25.27, take R1 = 220 Ω, R2 =...Ch. 25 - A professional-grade camera flash gets its energy...Ch. 25 - You're reengieering the camera flash of the...Ch. 25 - Defibrillators restore normal heart rhythm by...Ch. 25 - Example 25.5: You’re designing a defibrillator as...Ch. 25 - In Fig. 25.28, all resistors have the same value,...Ch. 25 - In Fig. 25.28, take all resistors to be 1 k Find...Ch. 25 - Three 1.5-V batteries, with internal resistances...Ch. 25 - Prob. 45PCh. 25 - You company is designing a battery-based backup...Ch. 25 - In the circuit of Fig. 25.30, find (a) the current...Ch. 25 - In Fig. 25.30, how much power is dissipated in the...Ch. 25 - Whats the ammeter reading in Fig. 25.31? FIGURE...Ch. 25 - Find all three currents in the circuit of Fig....Ch. 25 - In Example 25.4. ε2, is taken to be +9 V in the...Ch. 25 - The voltage across the 30-k resistor in Fig. 25.33...Ch. 25 - In Fig. 25.34, what are the meter readings when an...Ch. 25 - Prob. 55PCh. 25 - The voltage across a charging capacitor in an RC...Ch. 25 - Youre designing an external defibrillator that...Ch. 25 - A capacitor is charged until it holds 5.0 J of...Ch. 25 - A capacitor is charged until it holds 5.0 J of...Ch. 25 - In Fig. 25.35 the 2.0-F capacitor is charged to...Ch. 25 - For the circuit of Example 25.6, take = 100 V,...Ch. 25 - In Fig. 25.36, the switch is initially open and...Ch. 25 - Prob. 63PCh. 25 - An ammeter with resistance 1.42 is connected...Ch. 25 - In Fig. 25.37, take 1 = 12.0 V, 2 = 6.00 V, 3 =...Ch. 25 - With all values except 2 as given in the preceding...Ch. 25 - The voltage on a charged capacitor is monitored...Ch. 25 - Find the resistance needed in an RC circuit to...Ch. 25 - Suppose the currents into and out of a circuit...Ch. 25 - Show that a battery delivers the most power when...Ch. 25 - Youre writing the instruction manual for a stereo...Ch. 25 - Show that only half the total energy drawn from a...Ch. 25 - Find the equivalent resistance between A and B for...Ch. 25 - Prob. 74PCh. 25 - Obtain an expression for the rate of increase...Ch. 25 - The circuit in Fig. 25.39 extends forever to the...Ch. 25 - Figure 25.40 on the next page shows the voltage...Ch. 25 - Figure 25.41 shows a portion of a circuit used to...Ch. 25 - An electrochemical impulse traveling along the...Ch. 25 - In Fig. 25.27, take R1 = 47 Ω and R2 = 150 Ω....Ch. 25 - Write the node and loop equations for the circuit...Ch. 25 - Youre about to purchase a battery. Normally,...Ch. 25 - In the circuit of Fig. 25.42 the switch is...Ch. 25 - BIO Stray voltage is a serious problem on dairy...Ch. 25 - BIO Stray voltage is a serious problem on dairy...Ch. 25 - BIO Stray voltage is a serious problem on dairy...Ch. 25 - BIO Stray voltage is a serious problem on dairy...
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