Domanda del libro di testo
Light from the sun allows a solar cell to move electrons from the positive to the negative terminal, doing 2.4×10−19 J of work per electron. What is the emf of this solar cell?
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Ch 26: Potential and Field
Knight Calc5th EditionPhysics for Scientists and EngineersISBN: 9780137344796
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TOC.tableOfContents
- Ch 01: Concepts of Motion35
- Ch 02: Kinematics in One Dimension75
- Ch 03: Vectors and Coordinate Systems58
- Ch 04: Kinematics in Two Dimensions60
- Ch 05: Force and Motion23
- Ch 06: Dynamics I: Motion Along a Line53
- Ch 07: Newton's Third Law27
- Ch 08: Dynamics II: Motion in a Plane52
- Ch 09: Work and Kinetic Energy56
- Ch 10: Interactions and Potential Energy50
- Ch 11: Impulse and Momentum56
- Ch 12: Rotation of a Rigid Body71
- Ch 13: Newton's Theory of Gravity52
- Ch 14: Fluids and Elasticity44
- Ch 15: Oscillations55
- Ch 16: Traveling Waves37
- Ch 17: Superposition39
- Ch 18: A Macroscopic Description of Matter53
- Ch 19: Work, Heat, and the First Law of Thermodynamics60
- Ch 20: The Micro/Macro Connection53
- Ch 21: Heat Engines and Refrigerators34
- Ch 22: Electric Charges and Forces40
- Ch 23: The Electric Field39
- Ch 24: Gauss' Law32
- Ch 25: The Electric Potential63
- Ch 26: Potential and Field57
- Ch 27: Current and Resistance42
- Ch 28: Fundamentals of Circuits39
- Ch 29: The Magnetic Field47
- Ch 30: Electromagnetic Induction60
- Ch 31: Electromagnetic Fields and Waves32
- Ch 32: AC Circuits63
- Ch 33: Wave Optics32
- Ch 34: Ray Optics57
- Ch 35: Optical Instruments30
- Ch 36: Special Relativity38
- Ch 37: The Foundations of Modern Physics25
- Ch 38: Quantization49
- Ch 39: Wave Functions and Uncertainty31
- Ch 40: One-Dimensional Quantum Mechanics35
- Ch 41: Atomic Physics18
- Ch 42: Nuclear Physics27
Knight Calc5th EditionPhysics for Scientists and EngineersISBN: 9780137344796Non è quello che usi tu?Cambia libro di testo
Capitolo 26, Problema 14
What is the potential difference ΔV34 in FIGURE EX26.14?
Guida verificata passo dopo passo1
Step 1: Identify the components in FIGURE EX26.14 that are relevant to calculating the potential difference ΔV34. Typically, this involves analyzing the circuit elements (e.g., resistors, batteries) and their arrangement between points 3 and 4.
Step 2: Apply Kirchhoff's Voltage Law (KVL), which states that the sum of the potential differences around any closed loop in a circuit is zero. Write an equation for the loop that includes points 3 and 4.
Step 3: Determine the direction of current flow and the polarity of each component (e.g., resistors cause a voltage drop, batteries contribute a voltage rise). Use Ohm's Law, \( V = IR \), for resistors if needed.
Step 4: Sum the potential differences across all components between points 3 and 4. Include contributions from batteries and resistors, ensuring you account for their polarities correctly.
Step 5: Simplify the equation to find the potential difference ΔV34. This will be the net voltage change between points 3 and 4.
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Electric Potential Difference
Electric potential difference, or voltage, is the work done per unit charge in moving a charge between two points in an electric field. It is measured in volts (V) and indicates how much energy is available to move charges through a circuit. Understanding this concept is crucial for analyzing circuits and determining how energy is distributed among components.
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Percorso guidato
07:33
Electric Potential
Circuit Analysis
Circuit analysis involves applying principles of electricity to understand how current flows through a circuit and how voltage is distributed across its components. Techniques such as Ohm's Law, Kirchhoff's laws, and the use of series and parallel combinations are essential for solving problems related to potential differences in circuits.
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05:00Dimensional Analysis
Reference Points in Electric Circuits
In electric circuits, reference points are essential for measuring potential differences. Typically, one point is chosen as a reference (often ground), and the potential at other points is measured relative to this reference. This concept is vital for accurately determining the voltage between two points, such as ΔV34 in the given question.
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14:10Inertial Reference Frames
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