Carbon has a negative temperature coefficient of resistance of -0.5 × 10-3 (°C)−1.What temperature increase would result in a resistance decrease of 3% for a carbon resistor?

A) 60°C B) 100°C C) 20°C D) 40°C A) 60°C B) 100°C C) 20°C D) 40°C

An RC circuit with resistance R0 and capacitance C0 has a time constant τ0.Which of the following additions to the circuit would result in the time constant doubling?

A) a capacitor with capacitance 3C0 in series with the original C0 B) a capacitor with capacitance C0 in series with the original C0 C) a capacitor with capacitance 3C0 in parallel with the original C0 D) a capacitor with capacitance C0 in parallel with the original C0 A) a capacitor with capacitance 3C0 in series with the original C0 B) a capacitor with capacitance C0 in series with the original C0 C) a capacitor with capacitance 3C0 in parallel with the original C0 D) a capacitor with capacitance C0 in parallel with the original C0

A Nichrome wire has a radius of 0.50 mm and a resistivity of 1.5 × 10−6 Ω⋅m.If the wire carries a current of 1.0 A,what is the potential difference per unit length along this wire?

A) 1.9 V/m B) 0.95 V/m C) 1.6 V/m D) 0.003 V/m A) 1.9 V/m B) 0.95 V/m C) 1.6 V/m D) 0.003 V/m

Exam 19: Magnetism Magnets: Part A

Explore all topics

Carbon has a negative temperature coefficient of resistance of -0.5 × 10^-3 (°C)−¹.What temperature increase would result in a resistance decrease of 3% for a carbon resistor?

(Multiple Choice)

4.7/5

(81)

Question 41

Consider the circuit shown in the figure.What power is dissipated by the top 5-Ω resistor?

(Multiple Choice)

4.9/5

(76)

Question 42

A series RC circuit consists of a battery,a switch,a resistor,and a capacitor.In terms of the time constant Of this circuit,how long after the switch is closed does the current in the circuit reach half of its maximum value?

(Multiple Choice)

5.0/5

(88)

Question 43

If ε = 9.0 V,what is the current in the 30-Ω resistor?

(Multiple Choice)

5.0/5

(80)

Question 44

In the circuit segment shown if I = 8.0 mA and Q = 75 µC,what is the potential difference,V_A - V_B?

(Multiple Choice)

4.9/5

(76)

Question 45

Wire A and Wire B are each carrying the same current.If the diameter of Wire A is half that of Wire B,how does the drift velocity v_dA in Wire A compare to that in Wire B?

(Multiple Choice)

4.8/5

(88)

Question 46

The resistance of a platinum wire is to be calibrated for low-temperature work.A platinum wire with resistance 2.000 Ω at 20°C is immersed in liquid nitrogen at 77 K (−196°C).If the temperature response of the platinum wire is linear,what is the expected resistance of the platinum wire at −196°C? [α_platinum = 3.92 × 10−³ (°C)−¹].

(Multiple Choice)

4.7/5

(86)

Question 47

An RC circuit with resistance R₀ and capacitance C₀ has a time constant τ₀.Which of the following additions to the circuit would result in the time constant doubling?

(Multiple Choice)

4.9/5

(80)

Question 48

A certain material is in a room at 27°C.If the absolute temperature (K)of the material is tripled,its resistance quadruples.(Water freezes at 273 K. )What is the value for α,the temperature coefficient of resistivity?

(Multiple Choice)

4.8/5

(70)

Question 49

The following three appliances are connected to a 120-V house circuit: i)toaster,1200 W,ii)coffee pot,750 W,and iii)microwave,1000 W.If all were operated at the same time,what total current would they draw?

(Multiple Choice)

4.8/5

(94)

Question 50

A metallic conductor has a resistivity of 18 × 10−⁶ Ω⋅m.What is the resistance of a piece that is 15 m long and has a uniform cross sectional area of 6.0 × 10−⁶ m²?

(Multiple Choice)

4.8/5

(94)

Question 51

What is the current flowing through the 8-Ω resistor?

(Multiple Choice)

4.8/5

(87)

Question 52

You measure a 20.0-V potential difference across a 5.00-Ω resistor.What is the current flowing through it?

(Multiple Choice)

4.9/5

(83)

Question 53

If a lamp has resistance of 120 Ω when it operates at 200 W,what is the applied voltage?

(Multiple Choice)

4.8/5

(78)

Question 54

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

(Multiple Choice)

4.9/5

(72)

Question 55

A resistor is connected to a battery with negligible internal resistance.If you replace the resistor with one that has quadruple the resistance,by what factor does the power dissipated in the circuit change?

(Multiple Choice)

4.9/5

(74)

Question 56

A high-voltage transmission line carries 500 A at 700,000 V.What is the power carried by the line?

(Multiple Choice)

5.0/5

(79)

Question 57

A Nichrome wire has a radius of 0.50 mm and a resistivity of 1.5 × 10−⁶ Ω⋅m.If the wire carries a current of 1.0 A,what is the potential difference per unit length along this wire?

(Multiple Choice)

4.9/5

(66)

Question 58

What is the maximum number of 60-W light bulbs you can connect in parallel in a 120-V home circuit without tripping the 20-A circuit breaker?

(Multiple Choice)

4.8/5

(84)

Question 59

A wire carries a steady current of 0.1 A over a period of 200 s.What total charge passes through the wire in this time interval?

(Multiple Choice)

4.9/5

(81)

Question 60

Showing 41 - 60 of 67

Exam 19: Magnetism Magnets: Part A

Carbon has a negative temperature coefficient of resistance of -0.5 × 10-3 (°C)−1.What temperature increase would result in a resistance decrease of 3% for a carbon resistor?

Consider the circuit shown in the figure.What power is dissipated by the top 5-Ω resistor?

A series RC circuit consists of a battery,a switch,a resistor,and a capacitor.In terms of the time constant Of this circuit,how long after the switch is closed does the current in the circuit reach half of its maximum value?

If ε = 9.0 V,what is the current in the 30-Ω resistor?

In the circuit segment shown if I = 8.0 mA and Q = 75 µC,what is the potential difference,VA - VB?

Wire A and Wire B are each carrying the same current.If the diameter of Wire A is half that of Wire B,how does the drift velocity vdA in Wire A compare to that in Wire B?

An RC circuit with resistance R​0 and capacitance C​0 has a time constant τ​0.Which of the following additions to the circuit would result in the time constant doubling?

A certain material is in a room at 27°C.If the absolute temperature (K)of the material is tripled,its resistance quadruples.(Water freezes at 273 K. )What is the value for α,the temperature coefficient of resistivity?

The following three appliances are connected to a 120-V house circuit: i)toaster,1200 W,ii)coffee pot,750 W,and iii)microwave,1000 W.If all were operated at the same time,what total current would they draw?

A metallic conductor has a resistivity of 18 × 10−6 Ω⋅m.What is the resistance of a piece that is 15 m long and has a uniform cross sectional area of 6.0 × 10−6 m2?

What is the current flowing through the 8-Ω resistor?

You measure a 20.0-V potential difference across a 5.00-Ω resistor.What is the current flowing through it?

If a lamp has resistance of 120 Ω when it operates at 200 W,what is the applied voltage?

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

A resistor is connected to a battery with negligible internal resistance.If you replace the resistor with one that has quadruple the resistance,by what factor does the power dissipated in the circuit change?

A high-voltage transmission line carries 500 A at 700,000 V.What is the power carried by the line?

A Nichrome wire has a radius of 0.50 mm and a resistivity of 1.5 × 10−6 Ω⋅m.If the wire carries a current of 1.0 A,what is the potential difference per unit length along this wire?

What is the maximum number of 60-W light bulbs you can connect in parallel in a 120-V home circuit without tripping the 20-A circuit breaker?

A wire carries a steady current of 0.1 A over a period of 200 s.What total charge passes through the wire in this time interval?

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

Carbon has a negative temperature coefficient of resistance of -0.5 × 10^-3 (°C)−¹.What temperature increase would result in a resistance decrease of 3% for a carbon resistor?

In the circuit segment shown if I = 8.0 mA and Q = 75 µC,what is the potential difference,V_A - V_B?

Wire A and Wire B are each carrying the same current.If the diameter of Wire A is half that of Wire B,how does the drift velocity v_dA in Wire A compare to that in Wire B?

An RC circuit with resistance R₀ and capacitance C₀ has a time constant τ₀.Which of the following additions to the circuit would result in the time constant doubling?

A metallic conductor has a resistivity of 18 × 10−⁶ Ω⋅m.What is the resistance of a piece that is 15 m long and has a uniform cross sectional area of 6.0 × 10−⁶ m²?

A Nichrome wire has a radius of 0.50 mm and a resistivity of 1.5 × 10−⁶ Ω⋅m.If the wire carries a current of 1.0 A,what is the potential difference per unit length along this wire?