Exam 15: Electric Forces and Electric Fields

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If the size of the charge value is doubled for both of two point charges maintained at a constant separation,the mutual force between them will be changed by what factor?

(Multiple Choice)

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Question 21

A 6.64 μC charge is placed at the origin and a second charge is placed on the x-axis at x = 0.2 m.If the resulting force on the second charge is 6.4 N in the positive x-direction,what is the force on the charge at the origin?

(Multiple Choice)

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Question 22

Object A has a charge q on it,object B has a charge q on it,and object C has a charge 4q on it.These charges are arranged,one each,at the vertices of an equilateral triangle.Which charge has the greatest magnitude electric force on it?

(Multiple Choice)

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Question 23

Doug rubs a piece of fur on a hard rubber rod,giving the rod a negative charge.What happens?

(Multiple Choice)

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Question 24

An uncharged conductor is supported by an insulating stand.I pass a positively charged rod near the left end of the conductor,but do not touch it.The right end of the conductor will be:

(Multiple Choice)

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Question 25

Charges q,q,and -q are placed on the x-axis at x = 0,x = 6 m,and x = 12 m,respectively.At which of the following points does the electric field have the greatest magnitude?

(Multiple Choice)

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Question 26

Two point charges are separated by 12.0 cm and have charges of +5.00 µC and −5.00 µC,respectively.What is the electric field at a point midway between the two charges? (k_e = 8.99 × 10⁹ N·m²/C²)

(Multiple Choice)

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Question 27

Two identical balls have the same amount of charge,but the charge on ball A is positive and the charge on ball B is negative.The balls are placed on a smooth,level,frictionless table whose top is an insulator.Which of the following is true?

(Multiple Choice)

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Question 28

Two point charges,separated by 1.5 cm,have charge values of +2.0 and −4.0 µC,respectively.What is the value of the mutual force between them? (k_e = 8.99 × 10⁹ N⋅m²/C²)

(Multiple Choice)

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Question 29

Two small objects are suspended from threads.When the objects are moved close together,they attract one another.Which of the following could produce this result?

(Multiple Choice)

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Question 30

Which of the following best characterizes electrical insulators?

(Multiple Choice)

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Question 31

Charges of 2.3 µC and −7 µC are placed at two corners of an equilateral triangle with sides of 0.1 m.At the third corner,what is the electric field magnitude created by these two charges? (k_e = 8.99 × 10⁹ N·m²/C²)

(Multiple Choice)

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Question 32

We have an initially uncharged hollow metallic sphere with radius of 5.0 cm.I place a small object with a charge of +26 µC at the center of the sphere through a hole in the surface.Find the electric field present at a point 10 cm from the sphere's center.(k_e = 8.99 × 10⁹ N⋅m²/C²)

(Multiple Choice)

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Question 33

About how many electrons are in 190 grams of water (H₂O)?

(Multiple Choice)

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Question 34

We have a hollow metallic sphere with charge −5.9 µC and radius 5 cm.We insert a +10-µC charge at the center of the sphere through a hole in the surface.What charge now rests on the outer surface of the sphere?

(Multiple Choice)

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Question 35

If the distance between two point charges is doubled,the mutual force between them will be changed by what factor?

(Multiple Choice)

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Question 36

Two equal charges,each Q,are separated by some distance.What third charge would need to be placed half way between the two charges so that the net force on each charge would be zero?

(Multiple Choice)

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Question 37

If body P,with a positive charge,is placed in contact with body Q (initially uncharged),what will be the nature of the charge left on Q?

(Multiple Choice)

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Question 38

A spherical surface surrounds a point charge it its center.If the charge is doubled and if the radius of the surface is also doubled,what happens to the electric flux Φ_E out of the surface and the magnitude E of the electric field at the surface as a result of these doublings?

(Multiple Choice)

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Question 39

A 6.2 μC charge is placed at the origin and a second charge is placed on the x-axis at x = 0.1 m.If the resulting force on the second charge is 5.2 N in the positive x-direction,what is the value of its charge?

(Multiple Choice)

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Question 40

Showing 21 - 40 of 81

Exam 15: Electric Forces and Electric Fields

If the size of the charge value is doubled for both of two point charges maintained at a constant separation,the mutual force between them will be changed by what factor?

A 6.64 μC charge is placed at the origin and a second charge is placed on the x-axis at x = 0.2 m.If the resulting force on the second charge is 6.4 N in the positive x-direction,what is the force on the charge at the origin? ​

Object A has a charge q on it,object B has a charge q on it,and object C has a charge 4q on it.These charges are arranged,one each,at the vertices of an equilateral triangle.Which charge has the greatest magnitude electric force on it? ​

Doug rubs a piece of fur on a hard rubber rod,giving the rod a negative charge.What happens?

An uncharged conductor is supported by an insulating stand.I pass a positively charged rod near the left end of the conductor,but do not touch it.The right end of the conductor will be:

Charges q,q,and -q are placed on the x-axis at x = 0,x = 6 m,and x = 12 m,respectively.At which of the following points does the electric field have the greatest magnitude? ​

Two point charges are separated by 12.0 cm and have charges of +5.00 µC and −5.00 µC,respectively.What is the electric field at a point midway between the two charges? (ke = 8.99 × 109 N·m2/C2)

Two identical balls have the same amount of charge,but the charge on ball A is positive and the charge on ball B is negative.The balls are placed on a smooth,level,frictionless table whose top is an insulator.Which of the following is true?

Two point charges,separated by 1.5 cm,have charge values of +2.0 and −4.0 µC,respectively.What is the value of the mutual force between them? (ke = 8.99 × 109 N⋅m2/C2)

Two small objects are suspended from threads.When the objects are moved close together,they attract one another.Which of the following could produce this result?

Which of the following best characterizes electrical insulators?

Charges of 2.3 µC and −7 µC are placed at two corners of an equilateral triangle with sides of 0.1 m.At the third corner,what is the electric field magnitude created by these two charges? (ke = 8.99 × 109 N·m2/C2) ​

We have an initially uncharged hollow metallic sphere with radius of 5.0 cm.I place a small object with a charge of +26 µC at the center of the sphere through a hole in the surface.Find the electric field present at a point 10 cm from the sphere's center.(ke = 8.99 × 109 N⋅m2/C2) ​

About how many electrons are in 190 grams of water (H2O)?

We have a hollow metallic sphere with charge −5.9 µC and radius 5 cm.We insert a +10-µC charge at the center of the sphere through a hole in the surface.What charge now rests on the outer surface of the sphere? ​

If the distance between two point charges is doubled,the mutual force between them will be changed by what factor?

Two equal charges,each Q,are separated by some distance.What third charge would need to be placed half way between the two charges so that the net force on each charge would be zero?

If body P,with a positive charge,is placed in contact with body Q (initially uncharged),what will be the nature of the charge left on Q?

A spherical surface surrounds a point charge it its center.If the charge is doubled and if the radius of the surface is also doubled,what happens to the electric flux ΦE out of the surface and the magnitude E of the electric field at the surface as a result of these doublings?

A 6.2 μC charge is placed at the origin and a second charge is placed on the x-axis at x = 0.1 m.If the resulting force on the second charge is 5.2 N in the positive x-direction,what is the value of its charge? ​

Introduction

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Motion in One Dimension

Motion in One Dimension: Part A

Vectors and Two-Dimensional Motion

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The Laws of Motion

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Energy

Energy: Part A

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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

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The Laws of Thermodynamics Work in Thermodynamic Processes: Part A

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Vibrations and Waves: Part A

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Sound: Part A

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

Magnetism Magnets: Part A

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

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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

A 6.64 μC charge is placed at the origin and a second charge is placed on the x-axis at x = 0.2 m.If the resulting force on the second charge is 6.4 N in the positive x-direction,what is the force on the charge at the origin?

Object A has a charge q on it,object B has a charge q on it,and object C has a charge 4q on it.These charges are arranged,one each,at the vertices of an equilateral triangle.Which charge has the greatest magnitude electric force on it?

Charges q,q,and -q are placed on the x-axis at x = 0,x = 6 m,and x = 12 m,respectively.At which of the following points does the electric field have the greatest magnitude?

Two point charges are separated by 12.0 cm and have charges of +5.00 µC and −5.00 µC,respectively.What is the electric field at a point midway between the two charges? (k_e = 8.99 × 10⁹ N·m²/C²)

Two point charges,separated by 1.5 cm,have charge values of +2.0 and −4.0 µC,respectively.What is the value of the mutual force between them? (k_e = 8.99 × 10⁹ N⋅m²/C²)

Charges of 2.3 µC and −7 µC are placed at two corners of an equilateral triangle with sides of 0.1 m.At the third corner,what is the electric field magnitude created by these two charges? (k_e = 8.99 × 10⁹ N·m²/C²)

We have an initially uncharged hollow metallic sphere with radius of 5.0 cm.I place a small object with a charge of +26 µC at the center of the sphere through a hole in the surface.Find the electric field present at a point 10 cm from the sphere's center.(k_e = 8.99 × 10⁹ N⋅m²/C²)

About how many electrons are in 190 grams of water (H₂O)?

We have a hollow metallic sphere with charge −5.9 µC and radius 5 cm.We insert a +10-µC charge at the center of the sphere through a hole in the surface.What charge now rests on the outer surface of the sphere?

A spherical surface surrounds a point charge it its center.If the charge is doubled and if the radius of the surface is also doubled,what happens to the electric flux Φ_E out of the surface and the magnitude E of the electric field at the surface as a result of these doublings?

A 6.2 μC charge is placed at the origin and a second charge is placed on the x-axis at x = 0.1 m.If the resulting force on the second charge is 5.2 N in the positive x-direction,what is the value of its charge?