Two parallel plates that are initially uncharged are separated by 1.7 mm,have only air between them,and each have surface areas of 16 cm2.How much charge must be transferred from one plate to the other if 1.9 J of energy are to be stored in the plates? (ε0 = 8.85 × 10-12 C2/N ∙ m2)

A) 5.6 μC B) 4.0 μC C) 8.0 μC D) 0.60 mC A) 5.6 μC B) 4.0 μC C) 8.0 μC D) 0.60 mC

A proton is accelerated from rest through a potential difference V0 and gains a speed v0.If it were accelerated instead through a potential difference of 2V0,what speed would it gain?

A) 8v0 B) 4v0 C) 2v0 D) v0 $\sqrt { 2 }$ A) 8v0 B) 4v0 C) 2v0 D) v0 $\sqrt { 2 }$

Exam 16: The Electric Field

Two parallel plates that are initially uncharged are separated by 1.7 mm,have only air between them,and each have surface areas of 16 cm².How much charge must be transferred from one plate to the other if 1.9 J of energy are to be stored in the plates? (ε₀ = 8.85 × 10^-12C²/N ∙ m²)

(Multiple Choice)

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Question 81

A capacitor consists of two large parallel plates of area A separated by a very small distance d.This capacitor is connected to a battery and charged until its plates carry charges +Q and -Q,and then disconnected from the battery.If the separation between the plates is now doubled,the potential difference between the plates will

(Multiple Choice)

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Question 82

An electron is placed in a uniform electric field of E = 4.5 × 104 N/C that points to the right.(e = 1.6 × 10^-19 C,m_electron = 9.11 × 10-31 kg) (a)What are the magnitude and direction of the force exerted on the electron by the electric field? (b)If the electron is released from rest,what is its speed after 3.0 ps?

(Short Answer)

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Question 83

A proton is accelerated from rest through a potential difference V₀ and gains a speed v₀.If it were accelerated instead through a potential difference of 2V₀,what speed would it gain?

(Multiple Choice)

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Question 84

A parallel-plate capacitor is connected to a battery and becomes fully charged.The capacitor is then disconnected,and the separation between the plates is increased in such a way that no charge leaks off.As the plates are being separated,the energy stored in this capacitor

(Multiple Choice)

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Question 85

A proton moves 0.10 m along the direction of an $\vec { E }$ field of magnitude 3.0 V/m.What is the change in kinetic energy of the proton? (e = 1.60 × 10^-19 C)

(Multiple Choice)

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Question 86

A tiny 0.0250-µg oil drop containing 15 excess electrons is suspended between two horizontally closely-spaced metal plates that carry equal but opposite charges on their facing surfaces.The plates are both circular with a radius of 6.50 cm.(k = 1/4πε₀ = 9.0 × 10⁹ N ∙ m²/C²,e = 1.6 × 10^-19 C) (a)How much excess charge must be on each plate to hold the oil drop steady? (b)Which plate must be positive, the upper one or the lower one?

(Short Answer)

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Question 87

A parallel-plate capacitor consists of two parallel,square plates having dimensions 1.0 cm by 1.0 cm.The plates are separated by $1.0 \mathrm {~mm} \text {, }$ and the space between them is filled with Teflon,which has a dielectric constant of 2.1.What is the capacitance of this capacitor? (ε₀ = 8.85 × 10^-12C²/N ∙ m²)

(Multiple Choice)

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Question 88

The electric potential at a distance of 4 m from a certain point charge is 200 V relative to infinity.What is the potential (relative to infinity)at a distance of 2 m from the same charge?

(Multiple Choice)

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Question 89

What should the magnitude of a vertical $\vec { E }$ field be so that the force that the electric field exerts on a plastic sphere of mass $2.1 \mathrm {~g}$ that has been charged to -3.0 nC balances the force that Earth exerts on it? (k = 1/4πε₀ = 9.0 × 10⁹ N ∙ m²/C²)

(Multiple Choice)

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Question 90

The potential difference between two square parallel plates is 4.00 V.If the plate separation is 6.00 cm and they each measure 1.5 m by 1.5 m,what is the magnitude of the $\vec { E }$ field between the plates?

(Short Answer)

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Question 91

If an electron is accelerated from rest through a potential difference of 1500 V,what speed does it reach? (e = 1.60 × 10^-19C ,m_electron = 9.11 × 10^-31 kg)

(Multiple Choice)

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Question 92

Two ideal parallel-plate capacitors are identical in every respect except that one has twice the plate area of the other.If the smaller capacitor has capacitance C,the larger one has capacitance

(Multiple Choice)

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Question 93

A battery charges a parallel-plate capacitor fully and then is removed.The plates are then slowly pulled apart.What happens to the potential difference between the plates as they are being separated?

(Multiple Choice)

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Question 94

If it takes 50 J of energy to move 10 C of charge from point A to point B,what is the magnitude of the potential difference between points A and B?

(Multiple Choice)

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Question 95

A solid aluminum cube rests on a wooden table in a region where a uniform external electric field is directed straight upward.What can we say concerning the charge on the top surface of the cube?

(Multiple Choice)

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Question 96

Two very large parallel metal plates,separated by 0.20 m,are connected across a 12-V source of potential.An electron is released from rest at a location 0.10 m from the negative plate.When the electron arrives at a distance 0.050 m from the positive plate,how much kinetic energy has the electron gained? (e = 1.60 × 10^-19 C)

(Multiple Choice)

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Question 97

A 25.0-V potential source (a battery)is connected across the plates of a 6.66-µF air-filled parallel-plate capacitor having plates that are 1.22 mm apart.What energy density does it produce between the plates? (ε₀ = 8.85 × 10^-12C²/N ∙ m²)

(Short Answer)

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Question 98

A pair of charged conducting plates produces a uniform $\vec { E }$ field of 12,000 N/C,directed to the right,between the plates.The separation of the plates is 40 mm.An electron is projected from plate A,directly toward plate B,with an initial speed of v₀ = 2.0 × 10⁷ m/s.What is the speed of the electron as it strikes plate B? (e = 1.6 × 10^-19 C,m_electron = 9.11 × 10^-31 kg) $A pair of charged conducting plates produces a uniform \vec { E } field of 12,000 N/C,directed to the right,between the plates.The separation of the plates is 40 mm.An electron is projected from plate A,directly toward plate B,with an initial speed of v0 = 2.0 × 107 m/s.What is the speed of the electron as it strikes plate B? (e = 1.6 × 10-19 C,melectron = 9.11 × 10-31 kg)$

(Multiple Choice)

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Question 99

A small styrofoam ball of mass 0.120 g is placed at rest in an $\vec { E }$ field of 6000 N/C pointing downward.What excess charge must be placed on the ball for it to remain suspended in the field?

(Multiple Choice)

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Question 100

Showing 81 - 100 of 151

Exam 16: The Electric Field

Two parallel plates that are initially uncharged are separated by 1.7 mm,have only air between them,and each have surface areas of 16 cm2.How much charge must be transferred from one plate to the other if 1.9 J of energy are to be stored in the plates? (ε0 = 8.85 × 10-12 C2/N ∙ m2)

A proton is accelerated from rest through a potential difference V0 and gains a speed v0.If it were accelerated instead through a potential difference of 2V0,what speed would it gain?

A parallel-plate capacitor is connected to a battery and becomes fully charged.The capacitor is then disconnected,and the separation between the plates is increased in such a way that no charge leaks off.As the plates are being separated,the energy stored in this capacitor

A proton moves 0.10 m along the direction of an E⃗\vec { E }E field of magnitude 3.0 V/m.What is the change in kinetic energy of the proton? (e = 1.60 × 10-19 C)

The electric potential at a distance of 4 m from a certain point charge is 200 V relative to infinity.What is the potential (relative to infinity)at a distance of 2 m from the same charge?

What should the magnitude of a vertical E⃗\vec { E }E field be so that the force that the electric field exerts on a plastic sphere of mass 2.1 g2.1 \mathrm {~g}2.1 g that has been charged to -3.0 nC balances the force that Earth exerts on it? (k = 1/4πε0 = 9.0 × 109 N ∙ m2/C2)

The potential difference between two square parallel plates is 4.00 V.If the plate separation is 6.00 cm and they each measure 1.5 m by 1.5 m,what is the magnitude of the E⃗\vec { E }E field between the plates?

If an electron is accelerated from rest through a potential difference of 1500 V,what speed does it reach? (e = 1.60 × 10-19 C ,melectron = 9.11 × 10-31 kg)

Two ideal parallel-plate capacitors are identical in every respect except that one has twice the plate area of the other.If the smaller capacitor has capacitance C,the larger one has capacitance

A battery charges a parallel-plate capacitor fully and then is removed.The plates are then slowly pulled apart.What happens to the potential difference between the plates as they are being separated?

If it takes 50 J of energy to move 10 C of charge from point A to point B,what is the magnitude of the potential difference between points A and B?

A solid aluminum cube rests on a wooden table in a region where a uniform external electric field is directed straight upward.What can we say concerning the charge on the top surface of the cube?

A 25.0-V potential source (a battery)is connected across the plates of a 6.66-µF air-filled parallel-plate capacitor having plates that are 1.22 mm apart.What energy density does it produce between the plates? (ε0 = 8.85 × 10-12 C2/N ∙ m2)

A small styrofoam ball of mass 0.120 g is placed at rest in an E⃗\vec { E }E field of 6000 N/C pointing downward.What excess charge must be placed on the ball for it to remain suspended in the field?

Introduction

Kinematics: Motion in One Dimension

Newtonian Mechanics

Applying Newtons Laws

Circular Motion

Impulse and Linear Momentum

Work and Energy

Extended Bodies at Rest

Rotational Motion

Gases

Static Fluids

Fluids in Motion

First Law of Thermodynamics

Second Law of Thermodynamics

Electric Charge force and Energy

Dc Circuits

Magnetism

Electromagnetic Induction

Vibrational Motion

Mechanical Waves

Reflection and Refraction

Mirrors and Lenses

Wave Optics

Electromagnetic Waves

Special Relativity

Quantum Optics

Atomic Physics

Nuclear Physics

Particle Physics

Filters

Two parallel plates that are initially uncharged are separated by 1.7 mm,have only air between them,and each have surface areas of 16 cm².How much charge must be transferred from one plate to the other if 1.9 J of energy are to be stored in the plates? (ε₀ = 8.85 × 10^-12C²/N ∙ m²)

A proton is accelerated from rest through a potential difference V₀ and gains a speed v₀.If it were accelerated instead through a potential difference of 2V₀,what speed would it gain?

A proton moves 0.10 m along the direction of an $\vec { E }$ field of magnitude 3.0 V/m.What is the change in kinetic energy of the proton? (e = 1.60 × 10^-19 C)

What should the magnitude of a vertical $\vec { E }$ field be so that the force that the electric field exerts on a plastic sphere of mass $2.1 \mathrm {~g}$ that has been charged to -3.0 nC balances the force that Earth exerts on it? (k = 1/4πε₀ = 9.0 × 10⁹ N ∙ m²/C²)

The potential difference between two square parallel plates is 4.00 V.If the plate separation is 6.00 cm and they each measure 1.5 m by 1.5 m,what is the magnitude of the $\vec { E }$ field between the plates?

If an electron is accelerated from rest through a potential difference of 1500 V,what speed does it reach? (e = 1.60 × 10^-19C ,m_electron = 9.11 × 10^-31 kg)

A 25.0-V potential source (a battery)is connected across the plates of a 6.66-µF air-filled parallel-plate capacitor having plates that are 1.22 mm apart.What energy density does it produce between the plates? (ε₀ = 8.85 × 10^-12C²/N ∙ m²)

A small styrofoam ball of mass 0.120 g is placed at rest in an $\vec { E }$ field of 6000 N/C pointing downward.What excess charge must be placed on the ball for it to remain suspended in the field?