1 Introduction, Measurement, Estimating 2 Describing Motion: Kinematics In One Dimension 3 Kinematics In Two Or Three Dimensions; Vectors 4 Dynamics: Newton's Laws Of Motion 5 Using Newton's Laws: Friction, Circular Motion, Drag Forces 6 Gravitation And Newton's Synthesis 7 Work And Energy 8 Conservation Of Energy 9 Linear Momentum 10 Rotationalmotion 11 Angular Momentum; General Rotation 12 Static Equilibrium; Elasticity And Fracture 13 Fluids 14 Oscillations 15 Wave Motion 16 Sound 17 Temperature, Thermal Expansion And The Ideal Gas Law 18 Kinetic Theory Of Gases 19 Heat And The First Law Of Thermodynamics 20 Second Law Of Thermodynamics 21 Electric Charge And Electric Field 22 Gauss's Law 23 Electric Potential 24 Capacitance, Dielectrics, Electric Energy Storage 25 Electric Currents And Resistance 26 Dc Circuits 27 Magnetism 28 Sources Of Magnetic Field 29 Electromagnetic Induction And Faraday's Law 30 Inductance, Electromagnetic Oscillations, And Ac Circuits 31 Maxwell's Equation And Electromagnetic Waves 32 Light: Reflection And Refraction 33 Lenses And Optical Instruments 34 The Wave Nature Of Light: Interference 35 Diffraction And Polarization 36 Special Theory Of Relativity 37 Early Quantum Theory And Models Of The Atom 38 Quantum Mechanics 39 Quantum Mechanics Of Atoms 40 Molecules And Solids 41 Nuclear Physics And Radioactivity 42 Nuclear Energy; Effects And Uses Of Radiation 43 Elementary Particles 44 Astrophysics And Cosmology expand_more
26.1 Emf And Terminal Voltage 26.2 Resistors In Series And In Parallel 26.3 Kirchhoff S Rules 26.4 Series And Parallel Emfs; Battery Charging 26.5 Circuits Containing Resistor And Capacitor (rc Circuits) 26.6 Electric Hazards 26.7 Ammeters And Voltmeters Chapter Questions expand_more
Problem 1Q: Explain why birds can sit on power lines safely, whereas leaning a metal ladder up against a power... Problem 2Q: Discuss the advantages and disadvantages of Christmas tree lights connected in parallel versus those... Problem 3Q: If all you have is a 120-V line, would it be possible to light several 6-V lamps without burning... Problem 4Q: Two lightbulbs of resistance R1 and R2 (R2 R1) and a battery are all connected in series. Which... Problem 5Q: Household outlets are often double outlets. Are these connected in series or parallel? How do you... Problem 6Q: With two identical lightbulbs and two identical batteries, how would you arrange the bulbs and... Problem 7Q: If two identical resistors are connected in series to a battery, does the battery have to supply... Problem 8Q: You have a single 60-W bulb on in your room. How does the overall resistance of your rooms electric... Problem 9Q: When applying Kirchhoffs loop rule (such as in Fig. 2633), does the sign (or direction) of a... Problem 10Q: Compare and discuss the formulas for resistors and for capacitors when connected in series and in... Problem 11Q: For what use are batteries connected in series? For what use are they connected in parallel? Does it... Problem 12Q: Can the terminal voltage of a battery ever exceed its emf? Explain. Problem 13Q: Explain in detail how you could measure the internal resistance of a battery. Problem 14Q: In an RC circuit, current flows from the battery until the capacitor is completely charged. Is the... Problem 15Q: Given the circuit shown in Fig. 2634, use the words increases, decreases, or stays the same to... Problem 16Q: Figure 2635 is a diagram of a capacitor (or condenser) microphone. The changing air pressure in a... Problem 17Q: Design a circuit in which two different switches of the type shown in Fig. 2636 can be used to... Problem 18Q: What is the main difference between an analog voltmeter and an analog ammeter? Problem 19Q: What would happen if you mistakenly used an ammeter where you needed to use a voltmeter? Problem 20Q: Explain why an ideal ammeter would have zero resistance and an ideal voltmeter infinite resistance. Problem 21Q: A voltmeter connected across a resistor always reads less than the actual voltage across the... Problem 22Q: A small battery-operated flashlight requires a single 1.5-V battery. The bulb is barely glowing, but... Problem 23Q: Different lamps might have batteries connected in either of the two arrangements shown in Fig. 2637.... Problem 1P Problem 2P: (I) Four 1.50-V cells are connected in series to a 12- light-bulb. If the resulting current is 0.45... Problem 3P: (II) A 1.5-V dry cell can be tested by connecting it to a low-resistance ammeter. It should be able... Problem 4P: (II) What is the internal resistance of a 12.0-V car battery whose terminal voltage drops to 8.4V... Problem 5P: (I) A 650- and a 2200- resistor are connected in series with a 12-V battery. What is the voltage... Problem 6P: (I) Three 45- lightbulbs and three 65- lightbulbs are connected in series. (a) What is the total... Problem 7P: (I) Suppose that you have a 680-, a 720-, and a 1.20-k resistor. What is (a) the maximum, and (b)... Problem 8P: (I) How many 10- resistors must be connected in series to give an equivalent resistance to five 100-... Problem 9P: (II) Suppose that you have a 9.0-V battery and you wish to apply a voltage of only 4.0 V. Given an... Problem 10P: Three 1.70-k resistors can be connected together in four different ways, making combinations of... Problem 11P: (II) A battery with an emf of 12.0 V shows a terminal voltage of 11.8 V when operating in a circuit... Problem 12P: (II) Eight identical bulbs are connected in series across a 110-V line. (a) What is the voltage... Problem 13P: (II) Eight bulbs are connected in parallel to a 110-V source by two long leads of total resistance... Problem 14P: (II) The performance of the starter circuit in an automobile can be significantly degraded by a... Problem 15P: (II) A close inspection of an electric circuit reveals that a 480- resistor was inadvertently... Problem 16P: (II) Determine (a) the equivalent resistance of the circuit shown in Fig. 2639, and (b) the voltage... Problem 17P: (II) A 75-W, 110-V bulb is connected in parallel with a 25-W, 110-V bulb. What is the net... Problem 18P: (II) (a) Determine the equivalent resistance of the ladder of equal 125- resistors shown in Fig.... Problem 19P: (II) Whal is the net resistance of the circuit connected to the battery in Fig. 2641? Problem 20P: (II) Calculate the current through each resistor in Fig. 2641 if each resistance R = 1.20 k and V =... Problem 21P: (II) The two terminals of a voltage source with emf E and internal resistance r are connected to the... Problem 22P: (II) Two resistors when connected in series to a 110-V line use one-fourth the power that is used... Problem 23P: (III) Three equal resistors (R) are connected to a battery as shown in Fig. 2642. Qualitatively,... Problem 24P: (III) A 2.8-k and a 3.7-k resistor are connected in parallel: this combination is connected in... Problem 25P: (III) Consider the network of resistors shown in Fig. 2643. Answer qualitatively: (a) What happens... Problem 26P: (III) You are designing a wire resistance heater to heat an enclosed volume of gas. For the... Problem 27P: (I) Calculate the current in the circuit of Fig. 2645, and show that the sum of all the voltage... Problem 28P: (II) Determine the terminal voltage of each battery in Fig. 2646. FIGURE 2646 Problem 28. Problem 29P: (II) For the circuit shown in Fig. 2647, find the potential difference between points a and b. Each... Problem 30P: (II) (a) A network of five equal resistors R is connected to a battery as shown in Fig. 2648.... Problem 31P: (II) (a) What is the potential difference between points a and d in Fig. 2649 (similar to Fig. 2613,... Problem 32P: (II) Calculate the currents in each resistor of Fig. 2650. Problem 33P: (II) Determine the magnitudes and directions of the currents through R1 and R2 in Fig. 2651. Problem 34P: (II) Determine the magnitudes and directions of the currents in each resistor shown in Fig. 2652.... Problem 35P: (II) A voltage V is applied to n identical resistors connected in parallel. If the resistors are... Problem 36P: (III) (a) Determine the currents I1, I2, and I3 in Fig. 2653. Assume the internal resistance of each... Problem 37P: (III) What would the current I1 be in Fig. 2653 if the 12- resistor is shorted out (resistance = 0)?... Problem 38P: (III) Determine the current through each of the resistors in Fig. 2654. Problem 39P: (III) If the 25- resistor in Fig. 2654 is shorted out (resistance = 0), what then would be the... Problem 40P: (III) Twelve resistors, each of resistance R, are connected as the edges of a cube as shown in Fig.... Problem 41P: (III) Determine the net resistance in Fig. 2656 (a) between points a and c, and (b) between points a... Problem 42P: (II) Suppose two batteries, with unequal emfs of 2.00 V and 3.00 V, are connected as shown in Fig.... Problem 43P: (I) Estimate the range of resistance needed to make a variable timer for typical intermittent... Problem 44P: (II) In Fig. 2658 (same as Fig. 2617a), the total resistance is 15.0 k, and the batterys emf is 24.0... Problem 45P: (II) Two 3.8-F capacitors, two 2.2-k resistors, and a 12.0-V source are connected in series.... Problem 46P: (II) How long does it take for the energy stored in a capacitor in a series RC circuit (Fig. 2658)... Problem 47P: (II) A parallel-plate capacitor is filled with a dielectric of dielectric constant K and high... Problem 48P: (II) The RC circuit of Fig. 2659 (same as Fig. 2618a) has R = 8.7 k and C = 3.0 F. The capacitor is... Problem 49P: (II) Consider the circuit shown in Fig. 2660, where all resistors have the same resistance R. At t =... Problem 50P: (III) Determine the time constant for charging the capacitor in the circuit of Fig. 2661. [Hint: Use... Problem 51P: (III) Two resistors and two uncharged capacitors are arranged as shown in Fig. 2662. Then a... Problem 52P: (III) Suppose the switch S in Fig. 2662 is closed. What is the time constant (or time constants) for... Problem 53P: (I) An ammeter has a sensitivity of 35,00 /V. What current in the galvanometer produces full-scale... Problem 54P: (I) What is the resistance of a voltmeter on the 250-V scale if the meter sensitivity is 35.000/V? Problem 55P: (II) A galvanometer has a sensitivity of 45 k/V and internal resistance 20.0 . How could you make... Problem 56P: (II) A galvanometer has an internal resistance of 32 and deflects full scale for a 55-A current.... Problem 57P: (II) A particular digital meter is based on an electronic module that has an internal resistance of... Problem 58P: (II) A milliammeter reads 25 mA full scale. It consists of a 0.20- resistor in parallel with a 33-... Problem 59P: (II) A 45-V battery of negligible internal resistance is connected to a 44-k and a 27-k resistor in... Problem 60P: (II) An ammeter whose internal resistance is 53 reads 5.25 mA when connected in a circuit... Problem 61P: (II) A battery with E=12.0V and internal resistance r = 1.0 is connected to two 7.5-k resistors in... Problem 62P: (II) A 12.0-V battery (assume the internal resistance = 0) is connected to two resistors in series.... Problem 63P: (III) Two 9.4-k resistors are placed in series and connected to a battery. A voltmeter of... Problem 64P: (III) When the resistor R in Fig. 2664 is 35 , the high-resistance voltmeter reads 9.7 V. When R is... Problem 65GP: Suppose that you wish to apply a 0.25-V potential difference between two points on the human body.... Problem 66GP: A three-way lightbulb can produce 50 W, 100 W, or 150W, at 120 V. Such a bulb contains two filaments... Problem 67GP: Suppose you want to run some apparatus that is 65 m from an electric outlet. Each of the wires... Problem 68GP: For the circuit shown in Fig. 2618a, show that the decrease in energy stored in the capacitor from t... Problem 69GP: A heart pacemaker is designed to operate at 72 beats/min using a 6.5-F capacitor in a simple RC... Problem 70GP Problem 71GP: A Wheatstone bridge is a type of bridge circuit used to make measurements of resistance. The unknown... Problem 72GP: An unknown length of platinum wire 1.22 mm in diameter is placed as the unknown resistance in a... Problem 73GP: The internal resistance of a 1.35-V mercury cell is 0.030 , whereas that of a 1.5-V dry cell is 0.35... Problem 74GP: How many 12-W resistors, each of the same resistance, must be used to produce an equivalent 3.2-k,... Problem 75GP: A solar cell, 3.0 cm square, has an output of 350 mA at 0.80 V when exposed to full sunlight. A... Problem 76GP: A power supply has a fixed output voltage of 12.0 V, but you need VT = 3.0 V output for an... Problem 77GP: The current through the 4.0-k resistor in Fig. 2667 is 3.10 mA. What is the terminal voltage Vba of... Problem 78GP: A battery produces 40.8 V when 7.40 A is drawn from it, and 47.3 V when 2.80 A is drawn. What are... Problem 79GP: In the circuit shown in Fig. 2668, the 33- resistor dissipates 0.80 W. What is the battery voltage?... Problem 80GP: The current through the 20- resistor in Fig. 2669 does not change whether the two switches S1 and S2... Problem 81GP: (a) A voltmeter and an ammeter can be connected as shown in Fig. 2670a to measure a resistance R. If... Problem 82GP: (a) What is the equivalent resistance of the circuit shown in Fig. 2671? (b) What is the current in... Problem 83GP: A flashlight bulb rated at 2.0 W and 3.0 V is operated by a 9.0-V battery. To light the bulb at its... Problem 84GP: Some light-dimmer switches use a variable resistor as shown in Fig. 2673. The slide moves from... Problem 85GP: A potentiometer is a device to precisely measure potential differences or emf, using a null... Problem 86GP: Electronic devices often use an RC circuit to protect against power outages as shown in Fig. 2675.... Problem 87GP: The circuit shown in Fig. 2676 is a primitive 4-bit digital-to-analog converter (DAC). In this... Problem 88GP: Determine the current in each resistor of the circuit shown in Fig. 2677. FIGURE 2677 Problem 88. Problem 89GP: In the circuit shown in Fig. 2678, switch S is closed at time t = 0. (a) After the capacitor is... Problem 90GP: Figure 2679 shows the circuit for a simple sawtooth oscillator. At time t = 0, its switch S is... Problem 91GP: Measurements made on circuits that contain large resistances can be confusing. Consider a circuit... Problem 92GP: A typical voltmeter has an internal resistance of 10 M and can only measure voltage differences of... Problem 93GP: (II) An RC series circuit contains a resistor R = 15 k, a capacitor C = 0.30 F, and a battery of emf... format_list_bulleted