Domanda del libro di testo
Compared to an ideal battery, by what percentage does the battery's internal resistance reduce the potential difference across the 20 Ω resistor in FIGURE EX28.24?
726
views
1
rank
Ch 28: Fundamentals of Circuits
Knight Calc5th EditionPhysics for Scientists and EngineersISBN: 9780137344796
Non è quello che usi tu?Cambia libro di testoScegli un libro di testo diverso
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 28, Problema 16
What is the value of resistor R in FIGURE EX28.16?
Guida verificata passo dopo passo1
Step 1: Recognize that the resistors are connected in series. In a series circuit, the total resistance (R_total) is the sum of the individual resistances: R_total = R1 + R2 + R3.
Step 2: Use Ohm's Law, which states that ΔV = I × R_total, to relate the total voltage (ΔV), current (I), and total resistance (R_total). Rearrange the formula to find R_total: R_total = ΔV / I.
Step 3: Substitute the given values into the formula for R_total. The total voltage is ΔV = 5.0 V, and the current is I = 100 mA = 0.1 A. Calculate R_total using R_total = ΔV / I.
Step 4: Once R_total is calculated, subtract the known resistances (R1 = 10 Ω and R2 = 15 Ω) from R_total to find the unknown resistance R. Use the formula R = R_total - (R1 + R2).
Step 5: Perform the subtraction to isolate the value of R. This will give the resistance of the unknown resistor in the circuit.
Risposta video verificata per un problema simile:
Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Concetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Ohm's Law
Ohm's Law states that the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) of the conductor. It is mathematically expressed as V = I × R. This fundamental principle is essential for analyzing electrical circuits and determining unknown values such as resistance.
Video consigliato:
Percorso guidato
03:07
Resistance and Ohm's Law
Series Circuit
In a series circuit, components are connected end-to-end, so the same current flows through each component. The total resistance in a series circuit is the sum of the individual resistances. This concept is crucial for understanding how to calculate the total resistance when resistors are connected in series, as seen in the given circuit with a 10 Ω and a 15 Ω resistor.
Video consigliato:
Percorso guidato
05:55LRC Circuits in Series
Total Resistance Calculation
To find the total resistance in a series circuit, you simply add the resistances of all components. In this case, the total resistance (R_total) can be calculated as R_total = R1 + R2 + R, where R1 and R2 are the known resistances (10 Ω and 15 Ω). This total resistance can then be used in conjunction with Ohm's Law to solve for the unknown resistor R.
Video consigliato:
Percorso guidato
05:29Total Internal Reflection
Pratica correlata
Domanda del libro di testo
Two of the three resistors in FIGURE EX28.23 are unknown but equal. The total resistance between points 1 and 2 is 75Ω. What is the value of R?
306
views
1
rank
Domanda del libro di testo
A typical American family uses 1000 kWh of electricity a month. What is the average current in the 120 V power line to the house?
147
views
Domanda del libro di testo
Many electric companies use time-of-day pricing in which electricity costs more during hours of high demand. Suppose electricity costs \$0.21/kWh from 10 a.m. to 6 p.m.; \$0.09/kWh at all other times. What is the annual cost of electricity for a 2.5 kW industrial pump that runs 24 hours a day?
59
views
Domanda del libro di testo
The voltage across the terminals of a 9.0 V battery is 8.5 V when the battery is connected to a 20 Ω load. What is the battery's internal resistance?
124
views
Domanda del libro di testo
A typical American family uses 1000 kWh of electricity a month. On average, what is the resistance of a household?
107
views