Question 1

A charged particle moves with a constant speed through a region where a uniform magnetic field is present.If the magnetic field points straight upward,the magnetic force acting on this particle will be strongest when the particle moves

Accepted Answer

A)  straight upward.
B)  straight downward.
C)  in a plane parallel to Earth's surface.
D)  upward at an angle of 45° above the horizontal.E) C) and D)
F) B) and C)

Question 2

An electron,moving south,enters a magnetic field.Because of this field,the electron curves upward.We may conclude that the magnetic field must have a component

Accepted Answer

A)  downward.
B)  towards the east.
C)  upward.
D)  towards the west.
E)  towards the north.F) A) and E)
G) B) and C)

Question 3

A wire is carrying current vertically downward.What is the direction of the force on this wire due to Earth's magnetic field?

Accepted Answer

A)  horizontally towards the north
B)  horizontally towards the south
C)  horizontally towards the east
D)  horizontally towards the west
E)  vertically upwardF) A) and C)
G) A) and B)

Question 4

Three very long,straight,parallel wires each carry currents of 4.0 A,directed out of the page as shown in the figure.These wires pass through the vertices of a right isosceles triangle as shown.Assume that all the quantities shown in the figure are accurate to two significant figures.What is the magnitude of the magnetic field at point P at the midpoint of the hypotenuse of the triangle? (μ0 = 4π × 10-7 T ∙ m/A)  0 = 4π × 10-7 T ∙ m/A)    A) 4.4 µT B) 18 µT C) 57 µT D) 130 µT E) 1.8 µT" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  4.4 µT
B)  18 µT
C)  57 µT
D)  130 µT
E)  1.8 µTF) C) and D)
G) C) and E)

Question 5

A long straight wire on the z-axis carries a current of 8.0 A in the +z direction (out of the paper) .A circular loop of radius 10 cm lies in the xy-plane and carries a 3.0-A current,as shown in the figure.Point P,at the center of the loop,is 25 cm from the z-axis.An electron is projected from P with a velocity of 3.0 × 106 m/s in the -x direction.What is the y component of the magnetic force on the electron? (e = 1.60 × 10-19,μ0 = 4π × 10-7 T ∙ m/A)  6 m/s in the -x direction.What is the y component of the magnetic force on the electron? (e = 1.60 × 10-19,μ0 = 4π × 10-7 T ∙ m/A)    A) -9.0 × 10-18 N B) 9.0 × 10-18 N C) -4.5 × 10-18 N D) 4.5 × 10-18 N E) zero" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  -9.0 × 10-18 N
B)  9.0 × 10-18 N
C)  -4.5 × 10-18 N
D)  4.5 × 10-18 N
E)  zeroF) A) and B)
G) A) and C)

Question 6

The magnitude of the magnetic 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.How much current is flowing through the wire? (μ0 = 4π × 10-7 T ∙ m/A)

Accepted Answer

A)  30 mA
B)  190 mA
C)  19 mA
D)  380 mAE) All of the above
F) C) and D)

Question 7

A vertical wire carries a current vertically downward.To the east of this wire,the magnetic field points

Accepted Answer

A)  north.
B)  east.
C)  south.
D)  down.E) None of the above
F) A) and B)

Exam 22: Magnetism

The magnitude of the magnetic 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.How much current is flowing through the wire? (μ₀ = 4π × 10^-7 T ∙ m/A)

Correct Answer
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Correct Answer
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An electron,moving south,enters a magnetic field.Because of this field,the electron curves upward.We may conclude that the magnetic field must have a component

Correct Answer
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A vertical wire carries a current vertically downward.To the east of this wire,the magnetic field points

Correct Answer
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A charged particle moves with a constant speed through a region where a uniform magnetic field is present.If the magnetic field points straight upward,the magnetic force acting on this particle will be strongest when the particle moves

Correct Answer
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Correct Answer
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A wire is carrying current vertically downward.What is the direction of the force on this wire due to Earth's magnetic field?

Correct Answer
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Exam 22: Magnetism

The magnitude of the magnetic 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.How much current is flowing through the wire? (μ0 = 4π × 10-7 T ∙ m/A)

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

An electron,moving south,enters a magnetic field.Because of this field,the electron curves upward.We may conclude that the magnetic field must have a component

Correct AnswerverifiedShow Answer

A vertical wire carries a current vertically downward.To the east of this wire,the magnetic field points

Correct AnswerverifiedShow Answer

A charged particle moves with a constant speed through a region where a uniform magnetic field is present.If the magnetic field points straight upward,the magnetic force acting on this particle will be strongest when the particle moves

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A wire is carrying current vertically downward.What is the direction of the force on this wire due to Earth's magnetic field?

Correct AnswerverifiedShow Answer

The magnitude of the magnetic 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.How much current is flowing through the wire? (μ₀ = 4π × 10^-7 T ∙ m/A)

Correct Answer
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Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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