교과서 질문
The circuit shown in Fig. E contains two batteries, each with an emf and an internal resistance, and two resistors. Find the current in the circuit (magnitude and direction).
1590
views
Ch 25: Current, Resistance, and EMF
Young & Freedman Calc14th EditionUniversity PhysicsISBN: 9780321973610
Not the one you use?Change textbookSelect a different textbook
Table of contents
- Ch 01: Units, Physical Quantities & Vectors41
- Ch 02: Motion Along a Straight Line67
- Ch 03: Motion in Two or Three Dimensions47
- Ch 04: Newton's Laws of Motion23
- Ch 05: Applying Newton's Laws59
- Ch 06: Work & Kinetic Energy14
- Ch 07: Potential Energy & Conservation8
- Ch 08: Momentum, Impulse, and Collisions18
- Ch 09: Rotation of Rigid Bodies42
- Ch 10: Dynamics of Rotational Motion48
- Ch 11: Equilibrium & Elasticity27
- Ch 12: Fluid Mechanics31
- Ch 13: Gravitation35
- Ch 14: Periodic Motion32
- Ch 15: Mechanical Waves25
- Ch 16: Sound & Hearing32
- Ch 17: Temperature and Heat36
- Ch 18: Thermal Properties of Matter38
- Ch 19: The First Law of Thermodynamics33
- Ch 20: The Second Law of Thermodynamics22
- Ch 21: Electric Charge and Electric Field36
- Ch 22: Gauss' Law24
- Ch 23: Electric Potential31
- Ch 24: Capacitance and Dielectrics18
- Ch 25: Current, Resistance, and EMF26
- Ch 26: Direct-Current Circuits30
- Ch 27: Magnetic Field and Magnetic Forces18
- Ch 28: Sources of Magnetic Field10
- Ch 29: Electromagnetic Induction28
- Ch 30: Inductance17
- Ch 31: Alternating Current21
- Ch 32: Electromagnetic Waves1
- Ch 33: The Nature and Propagation of Light20
- Ch 34: Geometric Optics34
- Ch 35: Interference19
- Ch 36: Diffraction25
- Ch 37: Special Relativity20
- Ch 38: Photons: Light Waves Behaving as Particles15
- Ch 39: Particles Behaving as Waves26
- Ch 40: Quantum Mechanics I: Wave Functions21
- Ch 41: Quantum Mechanics II: Atomic Structure25
- Ch 42: Molecules and Condensed Matter18
- Ch 43: Nuclear Physics16
- Ch 44: Particle Physics and Cosmology23
25장, 문제 28c
An idealized ammeter is connected to a battery as shown in Fig. E. Find the terminal voltage of the battery.
검증된 단계별 안내1
Identify the components in the circuit: a battery with an emf of 12.0 V, a resistor of 8.0 Ω, and another resistor of 6.0 Ω.
Understand that the terminal voltage of the battery is the voltage across the battery when the circuit is closed, which is the emf minus the voltage drop due to the internal resistance.
Calculate the total resistance in the circuit. Since the resistors are in series, the total resistance R_total is the sum of the resistances: R_total = 8.0 Ω + 6.0 Ω.
Use Ohm's Law to find the current I in the circuit. Ohm's Law states that I = V / R, where V is the emf of the battery and R is the total resistance.
Calculate the terminal voltage V_terminal using the formula V_terminal = emf - I * r, where r is the internal resistance of the battery. If the internal resistance is not given, assume it is negligible for an ideal battery.
비슷한 문제에 대한 검증된 영상 답변:
이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
3m도움이 되었나요?
주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Ohm's Law
Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance. It is expressed as V = IR, where V is voltage, I is current, and R is resistance. This law is fundamental for analyzing electrical circuits and calculating the current flowing through components.
추천 영상:
가이드 코스
03:07
Resistance and Ohm's Law
Series Circuit
In a series circuit, components are connected end-to-end, forming a single path for current flow. The total resistance in a series circuit is the sum of individual resistances, and the same current flows through each component. Understanding series circuits is crucial for calculating the total resistance and voltage drops across each component, which affects the terminal voltage of the battery.
추천 영상:
가이드 코스
05:55LRC Circuits in Series
Terminal Voltage
Terminal voltage is the voltage output of a battery when it is connected in a circuit, accounting for any internal resistance. It is calculated by subtracting the voltage drop across the internal resistance from the electromotive force (EMF) of the battery. In practical terms, terminal voltage is the actual voltage available to the external circuit, which can be less than the battery's EMF due to internal resistance.
추천 영상:
가이드 코스
07:14RMS Current and Voltage
관련 실천
교과서 질문
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
교과서 질문
The circuit shown in Fig. E contains two batteries, each with an emf and an internal resistance, and two resistors. Find the terminal voltage of the -V battery.
1810
views
교과서 질문
An idealized ammeter is connected to a battery as shown in Fig. E. Find the reading of the ammeter.
2581
views
교과서 질문
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 .
1974
views
교과서 질문
An idealized ammeter is connected to a battery as shown in Fig. E. Find the current through the - resistor.
2106
views