Domanda del libro di testo
A copper transmission cable km long and cm in diameter carries a current of A. How much electrical energy is dissipated as thermal energy every hour?
2090
views
Ch 25: Current, Resistance, and EMF
Young & Freedman Calc15th EditionUniversity PhysicsISBN: 9780135159552
Non è quello che usi tu?Cambia libro di testoScegli un libro di testo diverso
TOC.tableOfContents
- Ch 01: Units, Physical Quantities & Vectors37
- Ch 02: Motion Along a Straight Line57
- Ch 03: Motion in Two or Three Dimensions45
- Ch 04: Newton's Laws of Motion23
- Ch 05: Applying Newton's Laws54
- Ch 06: Work & Kinetic Energy11
- Ch 07: Potential Energy & Conservation6
- Ch 08: Momentum, Impulse, and Collisions15
- Ch 09: Rotation of Rigid Bodies37
- Ch 10: Dynamics of Rotational Motion44
- Ch 11: Equilibrium & Elasticity27
- Ch 12: Fluid Mechanics27
- Ch 13: Gravitation34
- Ch 14: Periodic Motion26
- Ch 15: Mechanical Waves22
- Ch 16: Sound & Hearing28
- Ch 17: Temperature and Heat28
- Ch 18: Thermal Properties of Matter35
- Ch 19: The First Law of Thermodynamics29
- Ch 20: The Second Law of Thermodynamics18
- Ch 21: Electric Charge and Electric Field28
- Ch 22: Gauss' Law21
- Ch 23: Electric Potential31
- Ch 24: Capacitance and Dielectrics18
- Ch 25: Current, Resistance, and EMF24
- Ch 26: Direct-Current Circuits29
- Ch 27: Magnetic Field and Magnetic Forces16
- Ch 28: Sources of Magnetic Field10
- Ch 29: Electromagnetic Induction22
- Ch 30: Inductance14
- Ch 31: Alternating Current20
- Ch 33: The Nature and Propagation of Light17
- Ch 34: Geometric Optics29
- Ch 35: Interference13
- Ch 36: Diffraction19
- Ch 37: Special Relativity19
- Ch 38: Photons: Light Waves Behaving as Particles12
- Ch 39: Particles Behaving as Waves25
- Ch 40: Quantum Mechanics I: Wave Functions20
- Ch 41: Quantum Mechanics II: Atomic Structure21
- Ch 42: Molecules and Condensed Matter17
- Ch 43: Nuclear Physics13
- Ch 44: Particle Physics and Cosmology17
Young & Freedman Calc15th EditionUniversity PhysicsISBN: 9780135159552Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testo
Young & Freedman Calc 15th EditionCh 25: Current, Resistance, and EMFProblema 28a
Young & Freedman Calc 15th EditionCh 25: Current, Resistance, and EMFProblema 28aCapitolo 25, Problema 28a
An idealized ammeter is connected to a battery as shown in Fig. E. Find the reading of the ammeter.
Guida verificata passo dopo passo1
First, identify the components in the circuit: a battery with a voltage of 12.0 V, a resistor with a resistance of 16.8 Ω, and another resistor with a resistance of 12.0 Ω. The ammeter is connected in series with the 12.0 Ω resistor.
To find the reading of the ammeter, we need to calculate the current flowing through the circuit. Use Ohm's Law, which states that the current (I) is equal to the voltage (V) divided by the total resistance (R) in the circuit: I = V / R.
Calculate the total resistance in the circuit. Since the resistors are in series, the total resistance is the sum of the individual resistances: R_total = 16.8 Ω + 12.0 Ω.
Substitute the values into Ohm's Law: I = 12.0 V / R_total. This will give you the current flowing through the circuit, which is the reading of the ammeter.
Ensure that the units are consistent and check your calculations for any errors. The ammeter reading will be in amperes (A), which is the standard unit for current.
Risposta video verificata per un problema simile:
Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
3mConcetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Ohm's Law
Ohm's Law is a fundamental principle in electronics and electrical engineering, stating that the current (I) 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 I = V/R. This law is essential for calculating the current in the circuit shown in the image.
Video consigliato:
Percorso guidato
03:07
Resistance and Ohm's Law
Series and Parallel Circuits
In a series circuit, components are connected end-to-end, so the same current flows through each component. In a parallel circuit, components are connected across the same voltage source, allowing the current to divide among the paths. The circuit in the image is a series circuit, as the resistors and the ammeter are connected in a single loop, affecting how the total resistance and current are calculated.
Video consigliato:
Percorso guidato
09:51Combining Capacitors in Series & Parallel
Ideal Ammeter
An ideal ammeter is a device used to measure the current flowing through a circuit. It is assumed to have zero resistance, meaning it does not affect the current it measures. In the given circuit, the ammeter is connected in series with the resistors, and its reading will be the same as the current flowing through the entire circuit, calculated using Ohm's Law.
Video consigliato:
Percorso guidato
07:21Ideal Gases and the Ideal Gas Law
Pratica correlata
Domanda del libro di testo
The circuit shown in Fig. E contains two batteries, each with an emf and an internal resistance, and two resistors. Find the potential difference of point with respect to point .
1975
views
Domanda del libro di testo
An idealized ammeter is connected to a battery as shown in Fig. E. Find the terminal voltage of the battery.
1813
views
Domanda del libro di testo
In household wiring, copper wire mm in diameter is often used. Find the resistance of a -m length of this wire.
1901
views
Domanda del libro di testo
An idealized ammeter is connected to a battery as shown in Fig. E. Find the current through the - resistor.
2106
views
Domanda del libro di testo
What is the resistance of a carbon rod at °C if its resistance is at °C?
1894
views