A 22-Ω platinum wire at 20°C with a temperature coefficient of resistivity of 3.9 × 10−3 (°C)−1 will have what resistance at 100°C?

A) 29 Ω B) 20 Ω C) 26 Ω D) 14 Ω A) 29 Ω B) 20 Ω C) 26 Ω D) 14 Ω

Exam 19: Magnetism Magnets: Part A

A light bulb,sold as long-lasting,is rated 120 W at 130 V.The "increased" lifetime comes from using it at 120 V.Assuming negligible change in resistance at the different voltage,what is its power consumption at 120 V?

(Multiple Choice)

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Question 61

A 22-Ω platinum wire at 20°C with a temperature coefficient of resistivity of 3.9 × 10−³ (°C)−¹ will have what resistance at 100°C?

(Multiple Choice)

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Question 62

When a 24.0-Ω resistor is connected across a 12.0-V battery,a current of 410 mA flows.What is the internal resistance of the battery?

(Multiple Choice)

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Question 63

A 300-A·h battery can deliver how many coulombs starting from a full charge?

(Multiple Choice)

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Question 64

If ε = 20 V,at what rate is thermal energy being generated in the 40-Ω resistor?

(Multiple Choice)

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Question 65

A copper cable needs to carry a current of 200 A with a power loss of only 1.5 W/m.What is the required radius of the copper cable? (The resistivity of copper is 1.7 × 10−⁸ Ω⋅m. )

(Multiple Choice)

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Question 66

An 10.0-Ω resistor is dissipating 100 watts.What are the current through it and the difference of potential across it?

(Multiple Choice)

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Question 67

Showing 61 - 67 of 67

Exam 19: Magnetism Magnets: Part A

A light bulb,sold as long-lasting,is rated 120 W at 130 V.The "increased" lifetime comes from using it at 120 V.Assuming negligible change in resistance at the different voltage,what is its power consumption at 120 V?

A 22-Ω platinum wire at 20°C with a temperature coefficient of resistivity of 3.9 × 10−3 (°C)−1 will have what resistance at 100°C?

When a 24.0-Ω resistor is connected across a 12.0-V battery,a current of 410 mA flows.What is the internal resistance of the battery?

A 300-A·h battery can deliver how many coulombs starting from a full charge?

If ε = 20 V,at what rate is thermal energy being generated in the 40-Ω resistor?

A copper cable needs to carry a current of 200 A with a power loss of only 1.5 W/m.What is the required radius of the copper cable? (The resistivity of copper is 1.7 × 10−8 Ω⋅m. )

An 10.0-Ω resistor is dissipating 100 watts.What are the current through it and the difference of potential across it?

Introduction

Introduction: Part A

Motion in One Dimension

Motion in One Dimension: Part A

Vectors and Two-Dimensional Motion

Vectors and Two-Dimensional Motion: Part A

The Laws of Motion

The Laws of Motion: Part A

Energy

Energy: Part A

Momentum and Collisions

Momentum and Collisions: Part A

Rotational Motion and the Law of Gravity

Rotational Motion and the Law of Gravity: Part A

Rotational Equilibrium and Rotational Dynamics

Rotational Equilibrium and Rotational Dynamics: Part A

Solids and Fluids

Solids and Fluids: Part A

Thermal Physics

Thermal Physics: Part A

Energy in Thermal Processes Heat and Internal Energy

Energy in Thermal Processes Heat and Internal Energy: Part A

The Laws of Thermodynamics Work in Thermodynamic Processes

The Laws of Thermodynamics Work in Thermodynamic Processes: Part A

Vibrations and Waves

Vibrations and Waves: Part A

Sound

Sound: Part A

Electric Forces and Electric Fields

Electric Forces and Electric Fields: Part A

Electrical Energy and Capacitance

Electrical Energy and Capacitance: Part A

Current and Resistance Electric Current

Current and Resistance Electric Current: Part A

Direct-Current Circuits Sources of EMF

Direct-Current Circuits Sources of EMF: Part A

Magnetism Magnets

Induced Voltages and Inductance

Induced Voltages and Inductance: Part A

Alternating-Current Circuits and Electromagnetic Waves

Alternating-Current Circuits and Electromagnetic Waves: Part A

Reflection and Refraction of Light

Reflection and Refraction of Light: Part A

Mirrors and Lenses

Mirrors and Lenses: Part A

Wave Optics

Wave Optics: Part A

Optical Instruments

Optical Instruments: Part A

Relativity

Relativity: Part A

Quantum Physics Blackbody Radiation and Plancks Hypothesis

Quantum Physics Blackbody Radiation and Plancks Hypothesis: Part A

Atomic Physics

Atomic Physics: Part A

Nuclear Physics

Nuclear Physics: Part A

Nuclear Energy and Elementary Particles

Nuclear Energy and Elementary Particles: Part A

Particle Collisions, Mediating Photons, and Quark Structures: Exploring the Fundamentals of Physics

Filters

A 22-Ω platinum wire at 20°C with a temperature coefficient of resistivity of 3.9 × 10−³ (°C)−¹ will have what resistance at 100°C?

A copper cable needs to carry a current of 200 A with a power loss of only 1.5 W/m.What is the required radius of the copper cable? (The resistivity of copper is 1.7 × 10−⁸ Ω⋅m. )