Question 1

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

Accepted Answer

A)  down. 
B)  north. 
C)  east. 
D)  south. 
A)  down. 
B)  north. 
C)  east. 
D)  south.

Question 2

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

Accepted Answer

A)  both wires are lifted slightly. 
B)  the wires pull toward each other. 
C)  one wire is lifted slightly while the other wire is forced downward against the table's surface. 
D)  the wires push away from each other. 
A)  both wires are lifted slightly. 
B)  the wires pull toward each other. 
C)  one wire is lifted slightly while the other wire is forced downward against the table's surface. 
D)  the wires push away from each other.

Question 3

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?

Accepted Answer

A)  toward the west. 
B)  toward the south 
C)  toward the north 
D)  downward 
E)  upward 
A)  toward the west. 
B)  toward the south 
C)  toward the north 
D)  downward 
E)  upward

Question 4

How much current must pass through a 400 -turn ideal solenoid that is $4.0 \mathrm {~cm}$ long to generate a 1.0-T magnetic field at the center? $\left( \mu _ { 0 } = 4 \pi \times 10 ^ { - 7 } \mathrm {~T} \cdot \mathrm { m } / \mathrm { A } \right)$

Accepted Answer

A)  $80 \mathrm {~A}$ 
B)  $22 \mathrm {~A}$ 
C)  $40 \mathrm {~A}$ 
D)  $0.013 \mathrm {~A}$ 
E)  $13 \mathrm {~A}$ 
A)  $80 \mathrm {~A}$ 
B)  $22 \mathrm {~A}$ 
C)  $40 \mathrm {~A}$ 
D)  $0.013 \mathrm {~A}$ 
E)  $13 \mathrm {~A}$

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

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

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?

How much current must pass through a 400 -turn ideal solenoid that is $4.0 \mathrm {~cm}$ long to generate a 1.0-T magnetic field at the center? $\left( \mu _ { 0 } = 4 \pi \times 10 ^ { - 7 } \mathrm {~T} \cdot \mathrm { m } / \mathrm { A } \right)$

Introduction, Measurement, Estimating

Describing Motion: Kinematics in One Dimension

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Circular Motion; Gravitation

Work and Energy

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Static Equilibrium; Elasticity and Fracture

Fluids

Oscillations and Waves

Sound

Temperature and Kinetic Theory

Heat

The Laws of Thermodynamics

Electric Charge and Electric Field

Electric Potential

Electric Currents

Dc Circuits

Electromagnetic Induction and Faradays Law

Electromagnetic Waves

Light: Geometric Optics

The Wave Nature of Light

Optical Instruments

The Special Theory of Relativity

Early Quantum Theory and Models of the Atom

Quantum Mechanics of Atoms

Molecules and Solids

Nuclear Physics and Radioactivity

Nuclear Energy; Effects and Uses of Radiation

Elementary Particles

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Exam 20: Magnetism

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

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

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?

Introduction, Measurement, Estimating

Describing Motion: Kinematics in One Dimension

Kinematics in Two Dimensions; Vectors

Dynamics: Newtons Laws of Motion

Circular Motion; Gravitation

Work and Energy

Linear Momentum

Rotational Motion

Static Equilibrium; Elasticity and Fracture

Fluids

Oscillations and Waves

Sound

Temperature and Kinetic Theory

Heat

The Laws of Thermodynamics

Electric Charge and Electric Field

Electric Potential

Electric Currents

Dc Circuits

Electromagnetic Induction and Faradays Law

Electromagnetic Waves

Light: Geometric Optics

The Wave Nature of Light

Optical Instruments

The Special Theory of Relativity

Early Quantum Theory and Models of the Atom

Quantum Mechanics of Atoms

Molecules and Solids

Nuclear Physics and Radioactivity

Nuclear Energy; Effects and Uses of Radiation

Elementary Particles

Astrophysics and Cosmology

Filters