An electron moving perpendicular to a uniform magnetic field of 0.22 T moves in a circle with a speed of 1.5 × 107 m/s.What is the radius of the circle? (e = 1.60 × 10-19 C,melectron = 9.11 × 10-31kg)

A) 1.5 mm B) 0.22 mm C) 2.2 mm D) 0.39 mm E) 3.9 mm A) 1.5 mm B) 0.22 mm C) 2.2 mm D) 0.39 mm E) 3.9 mm

A flat circular loop carrying a current of 2.0 A is in a $\vec { B }$ 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 $\vec { B }$ field.What is the magnitude of the magnetic torque exerted 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 18: Magnetism

A straight 1.0-m long wire is carrying a current.The wire is placed perpendicular to a 0.20-T $\vec { B }$ field.If the magnetic force exerted on the wire has a magnitude of 0.60 N,what is the current in the wire?

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Question 1

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Alpha particles,each having a charge of +2e and a mass of 6.64 ×10^-27 kg,are accelerated in a uniform $0.50 \mathrm {~T}$ $\vec { B }$ field to a final orbit radius of $0.50 \mathrm {~m}$ The $\vec { B }$ 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,e = 1.60 × 10^-19C)

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Question 2

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The magnitude of the $\vec { B }$ field that a long and extremely thin current-carrying wire produces at a distance of 3.0 µm from the center of the wire is 2.0 × 10^-3 T.What is the current through the wire? (μ₀ = 4π × 10^-7 T ∙ m/A)

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Question 3

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An electron moving in the +y direction,at right angles to a magnetic field,the magnetic force exerted on it is in the -x direction.The direction of the $\vec { B }$ field is in the

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Question 4

Two long parallel wires carry currents of 20 A and 5.0 A in opposite directions.The wires are separated by 20 cm.At what point between the two wires do they produce the same magnitude $\vec { B }$ field?

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Question 5

A long straight wire has a constant current through it to the right.A rectangular metal loop is situated above the wire,and also has a constant current through it,as shown in the figure.Which one of the following statements is true?

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Question 6

A 2.0-m straight wire carrying a current of 0.60 A is oriented parallel to a uniform magnetic field of 0.50 T.What is the magnitude of the magnetic force exerted on it?

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Question 7

A long straight wire carrying a 4-A current is placed along the x-axis as shown in the figure.What is the magnitude of the $\vec { B }$ field at a point P,located at y = 2 cm,due to the current in this wire? (μ₀ = 4π × 10^-7 T ∙ m/A) $A long straight wire carrying a 4-A current is placed along the x-axis as shown in the figure.What is the magnitude of the \vec { B } field at a point P,located at y = 2 cm,due to the current in this wire? (μ<sub>0</sub> = 4π × 10<sup>-7</sup> T ∙ m/A)$

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Question 8

An electron moving perpendicular to a uniform magnetic field of 0.22 T moves in a circle with a speed of 1.5 × 10⁷ m/s.What is the radius of the circle? (e = 1.60 × 10^-19 C,m_electron = 9.11 × 10^-31kg)

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Question 9

Three long parallel wires each carry 2.0-A currents in the same direction.The wires are oriented vertically,and they pass through three of the corners of a horizontal square of side 4.0 cm.What is the magnitude of the $\vec { B }$ field at the fourth (unoccupied)corner of the square due to these wires? (μ₀ = 4π × 10^-7 T ∙ m/A)

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Question 10

An electron moving along the +x-axis enters a magnetic field.If the electron experiences a magnetic deflection in the -y direction,then the $\vec { B }$ field must have a component

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Question 11

A high power line carries a current of 1.0 kA.What is the magnitude of the $\vec { B }$ field this line produces at the ground,10 m away? (μ₀ = 4π × 10^-7 T ∙ m/A)

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Question 12

A very long thin wire produces a $\vec { B }$ field of $0.0020 \times 10 ^ { - 4 } \mathrm {~T}$ at a distance of $1.0 \mathrm {~mm}$ from the wire.What is the magnitude of the current? (μ₀ = 4π × 10^-7 T ∙ m/A)

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Question 13

A proton,with mass 1.67 × 10^-27 kg and charge +1.6 × 10^-19 C,is sent with velocity $2.3 \times 10^4 \mathrm {~m} / \mathrm { s }$ in the +x direction into a region where there is a uniform $\vec { E }$ field of magnitude $780 \mathrm {~V} / \mathrm { m }$ in the +y direction.What must be the magnitude and direction of the uniform $\vec { B }$ field in the region if the proton is to pass through undeflected? Assume that the magnetic field has no x component and neglect gravitational effects.

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Question 14

An electron moves with a speed of 8.0 × 10⁶ m/s along the +x-axis.It enters a region where there is a magnetic field of 2.5 T,directed at an angle of 60° to the +x-axis and lying in the xy-plane.Calculate the magnitude of the magnetic force on the electron.(e = 1.60 × 10^-19C)

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Question 15

A flat rectangular loop of wire carrying a 4.0-A current is placed in a uniform 0.60-T magnetic field.The magnitude of the torque exerted on this loop when the plane of the loop makes a 30° angle with the $\vec { B }$ field is measured to be 1.1 N ∙ m.What is the area of this loop?

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Question 16

An electron moves with a speed of 8.0 × 10⁶ m/s along the +x-axis.It enters a region where there is a magnetic field of 2.5 T,directed at an angle of 60° to the +x-axis and lying in the xy-plane.Calculate the magnitude of the acceleration of the electron.(e = 1.60 × 10^-19 C,m_e₁ = 9.11 × 10^-31 kg)

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Question 17

At point P the $\vec { B }$ 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)

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Question 18

A flat circular loop carrying a current of 2.0 A is in a $\vec { B }$ 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 $\vec { B }$ field.What is the magnitude of the magnetic torque exerted on the loop?

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Question 19

An electron moving perpendicular to a uniform magnetic field of 3.2 × 10^-2 T moves in a circle of radius 0.40 cm.How fast is this electron moving? (e = 1.60 × 10^-19 C,m_electron = 9.11 × 10^-31kg)

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Question 20

Showing 1 - 20 of 136

Exam 18: Magnetism

A straight 1.0-m long wire is carrying a current.The wire is placed perpendicular to a 0.20-T B⃗\vec { B }B field.If the magnetic force exerted on the wire has a magnitude of 0.60 N,what is the current in the wire?

The magnitude of the B⃗\vec { B }B field that a long and extremely thin current-carrying wire produces at a distance of 3.0 µm from the center of the wire is 2.0 × 10-3 T.What is the current through the wire? (μ0 = 4π × 10-7 T ∙ m/A)

An electron moving in the +y direction,at right angles to a magnetic field,the magnetic force exerted on it is in the -x direction.The direction of the B⃗\vec { B }B field is in the

Two long parallel wires carry currents of 20 A and 5.0 A in opposite directions.The wires are separated by 20 cm.At what point between the two wires do they produce the same magnitude B⃗\vec { B }B field?

A long straight wire has a constant current through it to the right.A rectangular metal loop is situated above the wire,and also has a constant current through it,as shown in the figure.Which one of the following statements is true?

A 2.0-m straight wire carrying a current of 0.60 A is oriented parallel to a uniform magnetic field of 0.50 T.What is the magnitude of the magnetic force exerted on it?

A long straight wire carrying a 4-A current is placed along the x-axis as shown in the figure.What is the magnitude of the B⃗\vec { B }B field at a point P,located at y = 2 cm,due to the current in this wire? (μ0 = 4π × 10-7 T ∙ m/A)

An electron moving perpendicular to a uniform magnetic field of 0.22 T moves in a circle with a speed of 1.5 × 107 m/s.What is the radius of the circle? (e = 1.60 × 10-19 C,melectron = 9.11 × 10-31kg)

An electron moving along the +x-axis enters a magnetic field.If the electron experiences a magnetic deflection in the -y direction,then the B⃗\vec { B }B field must have a component

A high power line carries a current of 1.0 kA.What is the magnitude of the B⃗\vec { B }B field this line produces at the ground,10 m away? (μ0 = 4π × 10-7 T ∙ m/A)

A very long thin wire produces a B⃗\vec { B }B field of 0.0020×10−4 T0.0020 \times 10 ^ { - 4 } \mathrm {~T}0.0020×10−4 T at a distance of 1.0 mm1.0 \mathrm {~mm}1.0 mm from the wire.What is the magnitude of the current? (μ0 = 4π × 10-7 T ∙ m/A)

An electron moves with a speed of 8.0 × 106 m/s along the +x-axis.It enters a region where there is a magnetic field of 2.5 T,directed at an angle of 60° to the +x-axis and lying in the xy-plane.Calculate the magnitude of the magnetic force on the electron.(e = 1.60 × 10-19C)

A flat rectangular loop of wire carrying a 4.0-A current is placed in a uniform 0.60-T magnetic field.The magnitude of the torque exerted on this loop when the plane of the loop makes a 30° angle with the B⃗\vec { B }B field is measured to be 1.1 N ∙ m.What is the area of this loop?

At point P the B⃗\vec { B }B 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 B⃗\vec { B }B 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 B⃗\vec { B }B field.What is the magnitude of the magnetic torque exerted on the loop?

An electron moving perpendicular to a uniform magnetic field of 3.2 × 10-2 T moves in a circle of radius 0.40 cm.How fast is this electron moving? (e = 1.60 × 10-19 C,melectron = 9.11 × 10-31kg)

Introduction

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Applying Newtons Laws

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Extended Bodies at Rest

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A straight 1.0-m long wire is carrying a current.The wire is placed perpendicular to a 0.20-T $\vec { B }$ field.If the magnetic force exerted on the wire has a magnitude of 0.60 N,what is the current in the wire?

The magnitude of the $\vec { B }$ field that a long and extremely thin current-carrying wire produces at a distance of 3.0 µm from the center of the wire is 2.0 × 10^-3 T.What is the current through the wire? (μ₀ = 4π × 10^-7 T ∙ m/A)

An electron moving in the +y direction,at right angles to a magnetic field,the magnetic force exerted on it is in the -x direction.The direction of the $\vec { B }$ field is in the

Two long parallel wires carry currents of 20 A and 5.0 A in opposite directions.The wires are separated by 20 cm.At what point between the two wires do they produce the same magnitude $\vec { B }$ field?

An electron moving perpendicular to a uniform magnetic field of 0.22 T moves in a circle with a speed of 1.5 × 10⁷ m/s.What is the radius of the circle? (e = 1.60 × 10^-19 C,m_electron = 9.11 × 10^-31kg)

An electron moving along the +x-axis enters a magnetic field.If the electron experiences a magnetic deflection in the -y direction,then the $\vec { B }$ field must have a component

A high power line carries a current of 1.0 kA.What is the magnitude of the $\vec { B }$ field this line produces at the ground,10 m away? (μ₀ = 4π × 10^-7 T ∙ m/A)

A very long thin wire produces a $\vec { B }$ field of $0.0020 \times 10 ^ { - 4 } \mathrm {~T}$ at a distance of $1.0 \mathrm {~mm}$ from the wire.What is the magnitude of the current? (μ₀ = 4π × 10^-7 T ∙ m/A)

An electron moves with a speed of 8.0 × 10⁶ m/s along the +x-axis.It enters a region where there is a magnetic field of 2.5 T,directed at an angle of 60° to the +x-axis and lying in the xy-plane.Calculate the magnitude of the magnetic force on the electron.(e = 1.60 × 10^-19C)

A flat rectangular loop of wire carrying a 4.0-A current is placed in a uniform 0.60-T magnetic field.The magnitude of the torque exerted on this loop when the plane of the loop makes a 30° angle with the $\vec { B }$ field is measured to be 1.1 N ∙ m.What is the area of this loop?

At point P the $\vec { B }$ 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 $\vec { B }$ 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 $\vec { B }$ field.What is the magnitude of the magnetic torque exerted on the loop?

An electron moving perpendicular to a uniform magnetic field of 3.2 × 10^-2 T moves in a circle of radius 0.40 cm.How fast is this electron moving? (e = 1.60 × 10^-19 C,m_electron = 9.11 × 10^-31kg)