A flat circular loop carrying a current of 2.0 A is in a magnetic field of 3.5 T.The loop has an area of 0.12 m2 and its plane is oriented at a 37° angle to the field.What is the magnitude of the magnetic torque on the loop?

A) 0.10 N ∙ m B) 0.51 N ∙ m C) 0.67 N ∙ m D) 46 N ∙ m A) 0.10 N ∙ m B) 0.51 N ∙ m C) 0.67 N ∙ m D) 46 N ∙ m

Exam 22: Magnetism

At what distance from a long straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of Earth's magnetic field of about 5.0 × 10^-5 T? (μ₀ = 4π × 10^-7 T ∙ m/A)

(Multiple Choice)

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Question 61

A flat circular loop of wire is in a uniform magnetic field of 0.30 T.The diameter of the loop is 1.0 m,and a 2.0-A current flows in it.What is the magnitude of the magnetic torque on the loop when the plane of the loop is parallel to the magnetic field?

(Multiple Choice)

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Question 62

A negatively charged particle -Q is moving to the right,directly above a wire having a current I flowing to the right,as shown in the figure.In what direction is the magnetic force exerted on the particle due to the current?

(Multiple Choice)

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Question 63

The magnetic field at point P due to a 2.0-A current flowing in a long,straight,thin wire is 8.0 μT.How far is point P from the wire? (μ₀ = 4π × 10^-7 T ∙ m/A)

(Multiple Choice)

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Question 64

At a particular instant,an electron moves toward the east in a uniform magnetic field that is directed straight downward.The magnetic force that acts on it is

(Multiple Choice)

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Question 65

A rectangular coil,with corners labeled ABCD,has length L and width w.It is placed between the poles of a magnet,as shown in the figure If there is a current I flowing through this coil in the direction shown,what is the direction of the force acting on section BC of this coil?

(Multiple Choice)

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Question 66

An electron has an initial velocity to the south but is observed to curve upward as the result of a magnetic field.This magnetic field must have a component

(Multiple Choice)

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Question 67

A wire lying in the plane of the page carries a current toward the bottom of the page,as shown in the figure.What is the direction of the magnetic force it produces on an electron that is moving to the left directly toward the wire,as shown?

(Multiple Choice)

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Question 68

A long straight wire carrying a 4-A current is placed along the x-axis as shown in the figure.What is the direction of the magnetic field at a point P due to this wire?

(Multiple Choice)

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Question 69

At a particular instant,a proton moves toward the east in a uniform magnetic field that is directed straight downward.The magnetic force that acts on it is

(Multiple Choice)

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Question 70

A flat circular loop carrying a current of 2.0 A is in a magnetic field of 3.5 T.The loop has an area of 0.12 m² and its plane is oriented at a 37° angle to the field.What is the magnitude of the magnetic torque on the loop?

(Multiple Choice)

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Question 71

After landing on an unexplored Klingon planet,Spock tests for the direction of the magnetic field by firing a beam of electrons in various directions and by recording the following observations: Electrons moving upward feel a magnetic force in the northwest direction. Electrons moving horizontally toward the north are pushed downward. Electrons moving horizontally toward the southeast are pushed upward. Mr.Spock therefore concludes that the magnetic field at this landing site is in which direction?

(Multiple Choice)

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Question 72

A horizontal wire carries a current straight toward you.From your point of view,the magnetic field caused by this current

(Multiple Choice)

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Question 73

A current-carrying loop of wire lies flat on a horizontal tabletop.When viewed from above,the current moves around the loop in a counterclockwise sense.For points on the tabletop outside the loop,the magnetic field lines caused by this current

(Multiple Choice)

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Question 74

Alpha particles,each having a charge of +2e and a mass of 6.64 × 10^-27 kg,are accelerated in a uniform Magnetic field to a final orbit radius of The field is perpendicular to the velocity of the particles.What is the kinetic energy of an alpha particle in the final orbit? (1 eV = 1.60 × 10^-19 J,

(Multiple Choice)

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Question 75

A flat circular loop of wire of radius 0.50 m that is carrying a 2.0-A current is in a uniform magnetic field of 0.30 T.What is the magnitude of the magnetic torque on the loop when the plane of its area is perpendicular to the magnetic field?

(Multiple Choice)

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Question 76

How much current must flow through a long straight wire for the magnetic field strength to be 1.0 mT at 1.0 cm from a wire? (μ₀ = 4π × 10^-7 T ∙ m/A)

(Multiple Choice)

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Question 77

A long,straight,horizontal wire carries current toward the east.An electron moves toward the east alongside and just south of the wire.What is the direction of the magnetic force on the electron?

(Multiple Choice)

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(72)

Question 78

A wire lying in the plane of this page carries a current directly toward the top of the page.What is the direction of the magnetic force this current produces on an electron that is moving perpendicular to the page and outward from it on the left side of the wire?

(Multiple Choice)

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Question 79

The magnetic force on a current-carrying wire in a magnetic field is the strongest when

(Multiple Choice)

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Question 80

Showing 61 - 80 of 147

Exam 22: Magnetism

At what distance from a long straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of Earth's magnetic field of about 5.0 × 10-5 T? (μ0 = 4π × 10-7 T ∙ m/A)

A flat circular loop of wire is in a uniform magnetic field of 0.30 T.The diameter of the loop is 1.0 m,and a 2.0-A current flows in it.What is the magnitude of the magnetic torque on the loop when the plane of the loop is parallel to the magnetic field?

A negatively charged particle -Q is moving to the right,directly above a wire having a current I flowing to the right,as shown in the figure.In what direction is the magnetic force exerted on the particle due to the current?

The magnetic field at point P due to a 2.0-A current flowing in a long,straight,thin wire is 8.0 μT.How far is point P from the wire? (μ0 = 4π × 10-7 T ∙ m/A)

At a particular instant,an electron moves toward the east in a uniform magnetic field that is directed straight downward.The magnetic force that acts on it is

A rectangular coil,with corners labeled ABCD,has length L and width w.It is placed between the poles of a magnet,as shown in the figure If there is a current I flowing through this coil in the direction shown,what is the direction of the force acting on section BC of this coil?

An electron has an initial velocity to the south but is observed to curve upward as the result of a magnetic field.This magnetic field must have a component

A wire lying in the plane of the page carries a current toward the bottom of the page,as shown in the figure.What is the direction of the magnetic force it produces on an electron that is moving to the left directly toward the wire,as shown?

A long straight wire carrying a 4-A current is placed along the x-axis as shown in the figure.What is the direction of the magnetic field at a point P due to this wire?

At a particular instant,a proton moves toward the east in a uniform magnetic field that is directed straight downward.The magnetic force that acts on it is

A flat circular loop carrying a current of 2.0 A is in a magnetic field of 3.5 T.The loop has an area of 0.12 m2 and its plane is oriented at a 37° angle to the field.What is the magnitude of the magnetic torque on the loop?

A horizontal wire carries a current straight toward you.From your point of view,the magnetic field caused by this current

A current-carrying loop of wire lies flat on a horizontal tabletop.When viewed from above,the current moves around the loop in a counterclockwise sense.For points on the tabletop outside the loop,the magnetic field lines caused by this current

Alpha particles,each having a charge of +2e and a mass of 6.64 × 10-27 kg,are accelerated in a uniform Magnetic field to a final orbit radius of The field is perpendicular to the velocity of the particles.What is the kinetic energy of an alpha particle in the final orbit? (1 eV = 1.60 × 10-19 J,

A flat circular loop of wire of radius 0.50 m that is carrying a 2.0-A current is in a uniform magnetic field of 0.30 T.What is the magnitude of the magnetic torque on the loop when the plane of its area is perpendicular to the magnetic field?

How much current must flow through a long straight wire for the magnetic field strength to be 1.0 mT at 1.0 cm from a wire? (μ0 = 4π × 10-7 T ∙ m/A)

A long,straight,horizontal wire carries current toward the east.An electron moves toward the east alongside and just south of the wire.What is the direction of the magnetic force on the electron?

A wire lying in the plane of this page carries a current directly toward the top of the page.What is the direction of the magnetic force this current produces on an electron that is moving perpendicular to the page and outward from it on the left side of the wire?

The magnetic force on a current-carrying wire in a magnetic field is the strongest when

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At what distance from a long straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of Earth's magnetic field of about 5.0 × 10^-5 T? (μ₀ = 4π × 10^-7 T ∙ m/A)

The magnetic field at point P due to a 2.0-A current flowing in a long,straight,thin wire is 8.0 μT.How far is point P from the wire? (μ₀ = 4π × 10^-7 T ∙ m/A)

A flat circular loop carrying a current of 2.0 A is in a magnetic field of 3.5 T.The loop has an area of 0.12 m² and its plane is oriented at a 37° angle to the field.What is the magnitude of the magnetic torque on the loop?

How much current must flow through a long straight wire for the magnetic field strength to be 1.0 mT at 1.0 cm from a wire? (μ₀ = 4π × 10^-7 T ∙ m/A)