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 24: Magnetic Fields and Forces

An ideal solenoid having 200 turns and carrying a current of 2.0 A is 25 cm long. What is the magnitude of the magnetic field at the center of the solenoid? (?₀ = 4? × 10^-7 T ? m/A)

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Question 61

A particle carrying a charge of +e travels in a circular path of radius R in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would have been

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Question 62

A wire in the shape of an "M" lies in the plane of the paper. It carries a current of 2.0 A, flowing from A to E, as shown in the figure. It is placed in a uniform magnetic field of 0.65 T in the same plane, directed as shown on the right side of the figure. The figure indicates the dimensions of the wire. Note that AB is parallel to DE and to the baseline from which the magnetic field direction is measured. What are the magnitude and direction of the force acting on section BC of this wire?

(Multiple Choice)

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Question 63

Two long parallel wires are placed side-by-side on a horizontal table. If the wires carry current in the same direction,

(Multiple Choice)

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Question 64

Which one of the following statements is correct?

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Question 65

At point P the magnetic field due to a long straight wire carrying a current of 2.0 A is 1.2 µT. How far is P from the wire? (μ₀ = 4π × 10^-7 T ∙ m/A)

(Multiple Choice)

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Question 66

Two long, parallel wires carry currents of different magnitudes. If the current in one of the wires is doubled and the current in the other wire is halved, what happens to the magnitude of the magnetic force that each wire exerts on the other?

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Question 67

A wire in the shape of an "M" lies in the plane of the paper. It carries a current of 2.0 A, flowing from A to E, as shown in the figure. It is placed in a uniform magnetic field of 0.85 T in the same plane, directed as shown on the right side of the figure. The figure indicates the dimensions of the wire. Note that AB is parallel to DE and to the baseline from which the magnetic field direction is measured. What are the magnitude and direction of the force acting on section DE of this wire?

(Multiple Choice)

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Question 68

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 69

A wire along the z-axis carries a current of 4.9 A in the +z direction. Find the magnitude and direction of the force exerted on a 3.3-cm long length of this wire by a uniform magnetic field pointing in the -x direction having a magnitude $0.43 \mathrm {~T}$

(Short Answer)

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Question 70

A wire carrying a current is shaped in the form of a circular loop of radius 4.0 mm. If the magnetic field strength at its center is $1.1 \mathrm { mT }$ with no external magnetic fields present, what is the magnitude of the current flowing through the wire? (?₀ = 4? × 10^-7 T ? m/A)

(Multiple Choice)

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Question 71

A rigid rectangular loop, measuring 0.30 m by 0.40 m, carries a current of 5.5 A, as shown in the figure. A uniform external magnetic field of magnitude 2.9 T in the -x direction is present. Segment CD is in the xz-plane and forms a 35° angle with the z-axis, as shown. What is the magnitude of the torque that the magnetic field exerts on the loop?

(Multiple Choice)

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Question 72

The direction of the force on a current-carrying wire in a magnetic field is

(Multiple Choice)

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Question 73

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 74

A charged particle that is moving in a static uniform magnetic field

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Question 75

A straight 1.0-m long wire is carrying a current. The wire is placed perpendicular to a magnetic field of strength 0.20 T. If the wire experiences a force of 0.60 N, what is the current in the wire?

(Multiple Choice)

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Question 76

Two long parallel wires are 0.400 m apart and carry currents of 4.00 A and 6.00 A. What is the magnitude of the force per unit length that each wire exerts on the other wire? (μ₀ = 4π × 10^-7 T ∙ m/A)

(Multiple Choice)

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Question 77

In order to trap the starship Enterprise, the diabolical Klingons build a huge ideal solenoid 10 light-years long with a diameter of 2.0 million kilometers. Every kilometer of length of the solenoid contains 100 turns of wire. What magnetic field strength is produced near the center of the solenoid using a current of 2.00 kA? (?₀ = 4? × 10^-7 T ? m/A)

(Short Answer)

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Question 78

Consider two current-carrying circular loops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of the other. If the magnetic field strength at the center of the smaller loop is B, what is the magnetic field strength at the center of the larger loop?

(Multiple Choice)

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Question 79

A wire in the shape of an "M" lies in the plane of the paper. It carries a current of 2.0 A, flowing from A to E, as shown in the figure. It is placed in a uniform magnetic field of 0.55 T in the same plane, directed as shown on the right side of the figure. The figure indicates the dimensions of the wire. Note that AB is parallel to DE and to the baseline from which the magnetic field direction is measured. What are the magnitude and direction of the force acting on section CD of this wire?

(Multiple Choice)

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Question 80

Showing 61 - 80 of 155

Exam 24: Magnetic Fields and Forces

An ideal solenoid having 200 turns and carrying a current of 2.0 A is 25 cm long. What is the magnitude of the magnetic field at the center of the solenoid? (?0 = 4? × 10-7 T ? m/A)

A particle carrying a charge of +e travels in a circular path of radius R in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would have been

Two long parallel wires are placed side-by-side on a horizontal table. If the wires carry current in the same direction,

Which one of the following statements is correct?

At point P the magnetic field due to a long straight wire carrying a current of 2.0 A is 1.2 µT. How far is P from the wire? (μ0 = 4π × 10-7 T ∙ m/A)

Two long, parallel wires carry currents of different magnitudes. If the current in one of the wires is doubled and the current in the other wire is halved, what happens to the magnitude of the magnetic force that each wire exerts on the other?

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 wire along the z-axis carries a current of 4.9 A in the +z direction. Find the magnitude and direction of the force exerted on a 3.3-cm long length of this wire by a uniform magnetic field pointing in the -x direction having a magnitude 0.43 T0.43 \mathrm {~T}0.43 T

A wire carrying a current is shaped in the form of a circular loop of radius 4.0 mm. If the magnetic field strength at its center is 1.1mT1.1 \mathrm { mT }1.1mT with no external magnetic fields present, what is the magnitude of the current flowing through the wire? (?0 = 4? × 10-7 T ? m/A)

The direction of the force on a current-carrying wire in a magnetic field is

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 charged particle that is moving in a static uniform magnetic field

A straight 1.0-m long wire is carrying a current. The wire is placed perpendicular to a magnetic field of strength 0.20 T. If the wire experiences a force of 0.60 N, what is the current in the wire?

Two long parallel wires are 0.400 m apart and carry currents of 4.00 A and 6.00 A. What is the magnitude of the force per unit length that each wire exerts on the other wire? (μ0 = 4π × 10-7 T ∙ m/A)

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An ideal solenoid having 200 turns and carrying a current of 2.0 A is 25 cm long. What is the magnitude of the magnetic field at the center of the solenoid? (?₀ = 4? × 10^-7 T ? m/A)

At point P the magnetic field due to a long straight wire carrying a current of 2.0 A is 1.2 µT. How far is 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?

A wire along the z-axis carries a current of 4.9 A in the +z direction. Find the magnitude and direction of the force exerted on a 3.3-cm long length of this wire by a uniform magnetic field pointing in the -x direction having a magnitude $0.43 \mathrm {~T}$

A wire carrying a current is shaped in the form of a circular loop of radius 4.0 mm. If the magnetic field strength at its center is $1.1 \mathrm { mT }$ with no external magnetic fields present, what is the magnitude of the current flowing through the wire? (?₀ = 4? × 10^-7 T ? m/A)

Two long parallel wires are 0.400 m apart and carry currents of 4.00 A and 6.00 A. What is the magnitude of the force per unit length that each wire exerts on the other wire? (μ₀ = 4π × 10^-7 T ∙ m/A)