Domanda del libro di testo
The electron drift speed is 2.0 X 10⁻⁴ m/s in a metal with a mean time between collisions of 5.0 x 10⁻¹⁴. What is the electric field strength?
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Ch 27: Current and Resistance
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 27, Problema 10b
A superconducting magnet carries a 100 A current through a 0.50-mm-diameter superconducting wire that is wound into a coil. How much charge flows through the wire in 15 minutes?
Guida verificata passo dopo passo1
Understand the problem: The goal is to calculate the total charge that flows through the superconducting wire in 15 minutes. The relationship between current, charge, and time is given by the formula: , where is the charge, is the current, and is the time.
Convert the time from minutes to seconds, as the SI unit of time in the formula is seconds. Use the conversion factor: . Multiply 15 minutes by 60 seconds per minute to get the time in seconds.
Substitute the given values into the formula. The current is 100 A, and the time is the value you calculated in the previous step. The formula becomes: .
Perform the multiplication to calculate the total charge . Ensure that the units are consistent, with current in amperes and time in seconds, so the result will be in coulombs (C).
Interpret the result: The total charge represents the amount of electric charge that flows through the wire in the given time period. This value is a measure of the total flow of electrons in the superconducting wire.
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Concetti chiave
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Current
Current is the flow of electric charge in a circuit, measured in amperes (A). It represents the rate at which charge passes through a given point in the circuit. In this question, a current of 100 A indicates that 100 coulombs of charge flow through the wire every second.
Video consigliato:
Percorso guidato
05:38
Intro to Current
Charge
Electric charge is a fundamental property of matter that causes it to experience a force when placed in an electromagnetic field. Charge is measured in coulombs (C), and it can be positive or negative. The total charge that flows through the wire can be calculated by multiplying the current by the time duration.
Video consigliato:
Percorso guidato
06:36Charging Objects
Time
Time is a measure of the duration in which events occur, typically measured in seconds (s). In this context, the time duration of 15 minutes needs to be converted into seconds to calculate the total charge that flows through the wire. Since 1 minute equals 60 seconds, 15 minutes equals 900 seconds.
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Percorso guidato
05:59Velocity-Time Graphs & Acceleration
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The current in a 2.0 mm x 2.0 mm square aluminum wire is 2.5 A. What are (a) the current density and (b) the electron drift speed?
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Domanda del libro di testo
The mean time between collisions for electrons in a gold wire is 25 fs, where 1 fs = 1 femtosecond = 10⁻¹⁵ s. How many times does the electron collide with an ion while moving this distance?
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Domanda del libro di testo
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The mean time between collisions for electrons in a gold wire is 25 fs, where 1 fs = 1 femtosecond = 10⁻¹⁵ s. What is the electron drift speed in a 35 mV/m electric field?
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