Exam 19: Magnetism Magnets

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A proton moving with a speed of 2.9 × 10⁵ m/s perpendicular to a uniform magnetic field of 0.35 T will follow which of the paths described below? (q_p = 1.6 × 10−¹⁹ C and m_p = 1.67 × 10−²⁷ kg)

(Multiple Choice)

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Question 61

Two long parallel wires 32.7 cm apart are carrying currents of 5.9 A and 28.5 A in the same direction.What is the magnitude of the magnetic field halfway between the wires?

(Multiple Choice)

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Question 62

Two long parallel wires 45.3 cm apart are carrying currents of 10.3 A and 29.8 A in the opposite direction.What is the magnitude of the magnetic field halfway between the wires?

(Multiple Choice)

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Question 63

A rectangular coil (0.12 m × 0.82 m)has 194 turns and is in a uniform magnetic field of 0.44 T.If the orientation of the coil is varied through all possible positions,the maximum torque on the coil by magnetic forces is 0.060 N⋅m.What is the current in the coil?

(Multiple Choice)

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Question 64

Which of the following locations has the smallest (in magnitude)magnetic declination?

(Multiple Choice)

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Question 65

A current in a solenoid coil creates a magnetic field inside that coil.The field strength is directly proportional to:

(Multiple Choice)

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Question 66

Magnetism had been a known phenomenon for some time before its relation to electric currents was found.That a current in a wire produces a magnetic field was discovered by:

(Multiple Choice)

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Question 67

The direction of the force on a current carrying wire located in an external magnetic field is which of the following?

(Multiple Choice)

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Question 68

A 71-m-long wire carrying a current of 4.9 A will be accompanied by a magnetic field of what strength at a distance of 0.090 m from the wire? (magnetic permeability in empty space µ₀ = 4π × 10−⁷ T⋅m/A)

(Multiple Choice)

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Question 69

A 1.0-m wire segment carrying a current of 0.88 A oriented parallel to a uniform magnetic field of 0.62 T experiences a force of what magnitude?

(Multiple Choice)

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Question 70

A circular loop carrying a current of 1.2 A is oriented in a magnetic field of 0.23 T.The loop has an area of 0.16 m² and is mounted on an axis,perpendicular to the magnetic field,which allows the loop to rotate.What is the torque on the loop when its plane is oriented at a 34° angle to the field?

(Multiple Choice)

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Question 71

A current-carrying wire of length 42 cm is positioned perpendicular to a uniform magnetic field.If the current is 6.7 A and it is determined that there is a resultant force of 2.9 N on the wire due to the interaction of the current and field,what is the magnetic field strength?

(Multiple Choice)

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Question 72

The term magnetic declination refers to which of the following?

(Multiple Choice)

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Question 73

A proton with initial kinetic energy E is moving in circular motion in a uniform magnetic field.When it has completed one eighth of a revolution,what is its kinetic energy?

(Multiple Choice)

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Question 74

A copper wire of length 11 cm is in a magnetic field of 0.42 T.If it has a mass of 19 g,what is the minimum current through the wire that would cause a magnetic force equal to its weight?

(Multiple Choice)

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Question 75

A horizontal wire of length 3.0 m carries a current of 6.0 A and is oriented so that the current direction is 50° S of W.The Earth's magnetic field is due north at this point and has a strength of 0.14 × 10−⁴ T.What is the direction of the force on the wire?

(Multiple Choice)

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Question 76

A soft magnetic material has which property?

(Multiple Choice)

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Question 77

The magnetic pole of the Earth nearest the geographic North Pole corresponds to which of the following?

(Multiple Choice)

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Question 78

Two parallel wires carry the a current I in the same direction.Midway between these wires is a third wire,also parallel to the other two,which carries a current 0.5 I,but in the direction opposite from the first two wires.In which direction are the net forces on the outer wires?

(Multiple Choice)

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Question 79

A proton is released such that its initial velocity is from right to left across this page.The proton's path,however,is deflected in a direction toward the bottom edge of the page due to the presence of a uniform magnetic field.What is the direction of this field?

(Multiple Choice)

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Question 80

Showing 61 - 80 of 82

Exam 19: Magnetism Magnets

A proton moving with a speed of 2.9 × 105 m/s perpendicular to a uniform magnetic field of 0.35 T will follow which of the paths described below? (qp = 1.6 × 10−19 C and mp = 1.67 × 10−27 kg)

Two long parallel wires 32.7 cm apart are carrying currents of 5.9 A and 28.5 A in the same direction.What is the magnitude of the magnetic field halfway between the wires?

Two long parallel wires 45.3 cm apart are carrying currents of 10.3 A and 29.8 A in the opposite direction.What is the magnitude of the magnetic field halfway between the wires?

A rectangular coil (0.12 m × 0.82 m)has 194 turns and is in a uniform magnetic field of 0.44 T.If the orientation of the coil is varied through all possible positions,the maximum torque on the coil by magnetic forces is 0.060 N⋅m.What is the current in the coil?

Which of the following locations has the smallest (in magnitude)magnetic declination?

A current in a solenoid coil creates a magnetic field inside that coil.The field strength is directly proportional to:

Magnetism had been a known phenomenon for some time before its relation to electric currents was found.That a current in a wire produces a magnetic field was discovered by:

The direction of the force on a current carrying wire located in an external magnetic field is which of the following?

A 71-m-long wire carrying a current of 4.9 A will be accompanied by a magnetic field of what strength at a distance of 0.090 m from the wire? (magnetic permeability in empty space µ0 = 4π × 10−7 T⋅m/A)

A 1.0-m wire segment carrying a current of 0.88 A oriented parallel to a uniform magnetic field of 0.62 T experiences a force of what magnitude?

A circular loop carrying a current of 1.2 A is oriented in a magnetic field of 0.23 T.The loop has an area of 0.16 m2 and is mounted on an axis,perpendicular to the magnetic field,which allows the loop to rotate.What is the torque on the loop when its plane is oriented at a 34° angle to the field?

A current-carrying wire of length 42 cm is positioned perpendicular to a uniform magnetic field.If the current is 6.7 A and it is determined that there is a resultant force of 2.9 N on the wire due to the interaction of the current and field,what is the magnetic field strength?

The term magnetic declination refers to which of the following?

A proton with initial kinetic energy E is moving in circular motion in a uniform magnetic field.When it has completed one eighth of a revolution,what is its kinetic energy?

A copper wire of length 11 cm is in a magnetic field of 0.42 T.If it has a mass of 19 g,what is the minimum current through the wire that would cause a magnetic force equal to its weight?

A horizontal wire of length 3.0 m carries a current of 6.0 A and is oriented so that the current direction is 50° S of W.The Earth's magnetic field is due north at this point and has a strength of 0.14 × 10−4 T.What is the direction of the force on the wire?

A soft magnetic material has which property?

The magnetic pole of the Earth nearest the geographic North Pole corresponds to which of the following?

Two parallel wires carry the a current I in the same direction.Midway between these wires is a third wire,also parallel to the other two,which carries a current 0.5 I,but in the direction opposite from the first two wires.In which direction are the net forces on the outer wires?

A proton is released such that its initial velocity is from right to left across this page.The proton's path,however,is deflected in a direction toward the bottom edge of the page due to the presence of a uniform magnetic field.What is the direction of this field?

Introduction

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Atomic Physics

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Nuclear Energy and Elementary Particles

Nuclear Energy and Elementary Particles: Part A

A proton moving with a speed of 2.9 × 10⁵ m/s perpendicular to a uniform magnetic field of 0.35 T will follow which of the paths described below? (q_p = 1.6 × 10−¹⁹ C and m_p = 1.67 × 10−²⁷ kg)

A 71-m-long wire carrying a current of 4.9 A will be accompanied by a magnetic field of what strength at a distance of 0.090 m from the wire? (magnetic permeability in empty space µ₀ = 4π × 10−⁷ T⋅m/A)

A horizontal wire of length 3.0 m carries a current of 6.0 A and is oriented so that the current direction is 50° S of W.The Earth's magnetic field is due north at this point and has a strength of 0.14 × 10−⁴ T.What is the direction of the force on the wire?