Two charges Q1 and Q2 are distance d apart.If the electric field is zero at distance 3d/2 from Q1 and d/2 from Q2,along the line joining Q1 and Q2,then what is the relation between Q1 and Q2?

A) Q1 = 9Q2 B) Q1 = -Q2 /9 C) Q1 = Q2 /3 D) Q1 = -3Q2 E) Q1 = -9Q2 A) Q1 = 9Q2 B) Q1 = -Q2 /9 C) Q1 = Q2 /3 D) Q1 = -3Q2 E) Q1 = -9Q2

Exam 21: The Electric Field I: Discrete Charge Distributions

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Use the picture for the next problem. A conducting sphere has a net charge of -q and of mass m is suspended from the ceiling by a light string.A uniform electric field E is applied vertical down on the sphere. -The tension T in the string is ____ the weight mg.

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Question 21

In a uniform electric field a proton has

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Question 22

An electric field with a magnitude of 6.0 $\times$ 10⁴ N/C is directed parallel to the positive y axis.A particle with a charge q = 4.8 $\times$ 10^-19 C is moving along the x axis with a speed v = 3.0 $\times$ 10⁶ m/s.The force on the charge is approximately

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Question 23

Which of the following statements about electric field lines are true?

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Question 24

If an object is determined to have a negative charge of 160 nC,you can conclude that the object has an excess of

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Question 25

A particular nucleus of the element plutonium contains 94 protons and 150 neutrons.What is the magnitude of the electric field at a distance of 0.563 $\times$ 10^-12 m from the nucleus?

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Question 26

Use the picture for the next problem. A conducting sphere has a net charge of -q and of mass m is suspended from the ceiling by a light string.A uniform electric field E is applied vertical down on the sphere. $Use the picture for the next problem. A conducting sphere has a net charge of -q and of mass m is suspended from the ceiling by a light string.A uniform electric field E is applied vertical down on the sphere. -If m = 1 g,q = 1 \circ C and E = 5000 N/C,the tension T in the string is$ -If m = 1 g,q = 1 ^$\circ$C and E = 5000 N/C,the tension T in the string is

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Question 27

A proton is about 2000 times more massive that an electron but they both have charges of the same magnitude.The magnitude of the force on an electron by a proton is ____ the magnitude of the force on the proton by the electron.

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Question 28

A positive charge that is in an electric field experiences a force that is

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Question 29

Two charges of the same magnitude and sign are placed a certain distance apart.There is only one point in space near them where the electric field is zero.Which,if any,of the following statements about that point is true?

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Question 30

Coulomb's law and Newton's law of gravitation both involve which of the following?

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Question 31

Which of the following statements about conductors and insulators is NOT correct?

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Question 32

Which of the following statements is not true?

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Question 33

The force between two very small charged bodies is found to be F.If the distance between them is doubled without altering their charges,the force between them becomes

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Question 34

A positive charge of 94.0 nC is 12.0 cm from a negative charge of 53.0 nC.The force on one of the charges due to the other is approximately

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Question 35

A particular nucleus of the element erbium contains 68 protons and 90 neutrons.What is the total number of electrons in the neutral erbium atom?

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Question 36

An electric dipole $An electric dipole of magnitude 25 p C · m makes an angle of 65º with a uniform electric field of magnitude 3.0 \times 10-6 N/C.What is the magnitude of the torque on the dipole?$ of magnitude 25 p C · m makes an angle of 65º with a uniform electric field $An electric dipole of magnitude 25 p C · m makes an angle of 65º with a uniform electric field of magnitude 3.0 \times 10-6 N/C.What is the magnitude of the torque on the dipole?$ of magnitude 3.0 $\times$ 10^-6 N/C.What is the magnitude of the torque on the dipole?

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Question 37

Point charges of 4.0 $\times$ 10^-8 C and -2.0 $\times$ 10^-8 C are placed 12 cm apart.A third point charge of 3.0 $\times$ 10^-8 C halfway between the first two point charges experiences a force of magnitude

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Question 38

Two charges Q₁ and Q₂ are distance d apart.If the electric field is zero at distance 3d/2 from Q₁ and d/2 from Q₂,along the line joining Q₁ and Q₂,then what is the relation between Q₁ and Q₂?

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Question 39

The direction of the electric field at a point is the same as

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Question 40

Showing 21 - 40 of 55

Exam 21: The Electric Field I: Discrete Charge Distributions

Use the picture for the next problem. A conducting sphere has a net charge of -q and of mass m is suspended from the ceiling by a light string.A uniform electric field E is applied vertical down on the sphere. -The tension T in the string is ____ the weight mg.

In a uniform electric field a proton has

An electric field with a magnitude of 6.0 ×\times× 104 N/C is directed parallel to the positive y axis.A particle with a charge q = 4.8 ×\times× 10-19 C is moving along the x axis with a speed v = 3.0 ×\times× 106 m/s.The force on the charge is approximately

Which of the following statements about electric field lines are true?

If an object is determined to have a negative charge of 160 nC,you can conclude that the object has an excess of

A particular nucleus of the element plutonium contains 94 protons and 150 neutrons.What is the magnitude of the electric field at a distance of 0.563 ×\times× 10-12 m from the nucleus?

Use the picture for the next problem. A conducting sphere has a net charge of -q and of mass m is suspended from the ceiling by a light string.A uniform electric field E is applied vertical down on the sphere. -If m = 1 g,q = 1 ∘\circ∘ C and E = 5000 N/C,the tension T in the string is

A proton is about 2000 times more massive that an electron but they both have charges of the same magnitude.The magnitude of the force on an electron by a proton is ____ the magnitude of the force on the proton by the electron.

A positive charge that is in an electric field experiences a force that is

Two charges of the same magnitude and sign are placed a certain distance apart.There is only one point in space near them where the electric field is zero.Which,if any,of the following statements about that point is true?

Coulomb's law and Newton's law of gravitation both involve which of the following?

Which of the following statements about conductors and insulators is NOT correct?

Which of the following statements is not true?

The force between two very small charged bodies is found to be F.If the distance between them is doubled without altering their charges,the force between them becomes

A positive charge of 94.0 nC is 12.0 cm from a negative charge of 53.0 nC.The force on one of the charges due to the other is approximately

A particular nucleus of the element erbium contains 68 protons and 90 neutrons.What is the total number of electrons in the neutral erbium atom?

An electric dipole of magnitude 25 p C · m makes an angle of 65º with a uniform electric field of magnitude 3.0 ×\times× 10-6 N/C.What is the magnitude of the torque on the dipole?

Point charges of 4.0 ×\times× 10-8 C and -2.0 ×\times× 10-8 C are placed 12 cm apart.A third point charge of 3.0 ×\times× 10-8 C halfway between the first two point charges experiences a force of magnitude

Two charges Q1 and Q2 are distance d apart.If the electric field is zero at distance 3d/2 from Q1 and d/2 from Q2,along the line joining Q1 and Q2,then what is the relation between Q1 and Q2?

The direction of the electric field at a point is the same as

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An electric field with a magnitude of 6.0 $\times$ 10⁴ N/C is directed parallel to the positive y axis.A particle with a charge q = 4.8 $\times$ 10^-19 C is moving along the x axis with a speed v = 3.0 $\times$ 10⁶ m/s.The force on the charge is approximately

A particular nucleus of the element plutonium contains 94 protons and 150 neutrons.What is the magnitude of the electric field at a distance of 0.563 $\times$ 10^-12 m from the nucleus?

Point charges of 4.0 $\times$ 10^-8 C and -2.0 $\times$ 10^-8 C are placed 12 cm apart.A third point charge of 3.0 $\times$ 10^-8 C halfway between the first two point charges experiences a force of magnitude

Two charges Q₁ and Q₂ are distance d apart.If the electric field is zero at distance 3d/2 from Q₁ and d/2 from Q₂,along the line joining Q₁ and Q₂,then what is the relation between Q₁ and Q₂?