Filters
Question type
Study Flashcards

A ring with a clockwise current (as seen from above the ring) is situated with its center directly above another ring,which has a counter-clockwise current,as shown in the figure.In what direction is the net magnetic force exerted on the top ring? A ring with a clockwise current (as seen from above the ring) is situated with its center directly above another ring,which has a counter-clockwise current,as shown in the figure.In what direction is the net magnetic force exerted on the top ring? A) upward B) downward C) to the right D) to the left E) The net force is zero.


A) upward
B) downward
C) to the right
D) to the left
E) The net force is zero.

Correct Answer

verifed

verified

Two very long parallel wires in the xy-plane,a distance 2a apart,are parallel to the y-axis and carry equal currents I as shown in the figure.The +z direction points perpendicular to the xy-plane in a right-handed coordinate system.If both currents flow in the +y direction,which one of the graphs shown in the figure below best represents the z component of the net magnetic field,in the xy-plane,as a function of x? (Caution: These graphs are not magnetic field lines.) Two very long parallel wires in the xy-plane,a distance 2a apart,are parallel to the y-axis and carry equal currents I as shown in the figure.The +z direction points perpendicular to the xy-plane in a right-handed coordinate system.If both currents flow in the +y direction,which one of the graphs shown in the figure below best represents the z component of the net magnetic field,in the xy-plane,as a function of x? (Caution: These graphs are not magnetic field lines.) A) 1 B) 2 C) 3 D) 4 E) 5 Two very long parallel wires in the xy-plane,a distance 2a apart,are parallel to the y-axis and carry equal currents I as shown in the figure.The +z direction points perpendicular to the xy-plane in a right-handed coordinate system.If both currents flow in the +y direction,which one of the graphs shown in the figure below best represents the z component of the net magnetic field,in the xy-plane,as a function of x? (Caution: These graphs are not magnetic field lines.) A) 1 B) 2 C) 3 D) 4 E) 5


A) 1
B) 2
C) 3
D) 4
E) 5

Correct Answer

verifed

verified

A type of transmission line for electromagnetic waves consists of two parallel conducting plates (assumed infinite in width) separated by a distance a.Each plate carries the same uniform surface current density of 16.0 A/m,but the currents run in opposite directions.What is the magnitude of the magnetic field between the plates at a point 1.00 mm from one of the plates if a = 0.800 cm? (μ0 = 4π × 10-7 T • m/A)


A) 3.20 × 10-3 T
B) 1.00 × 10-5 T
C) 4.63 × 10-5 T
D) 2.01 × 10-5 T
E) 7.07 × 10-4 T

Correct Answer

verifed

verified

The figure shows two long wires carrying equal currents I1 and I2 flowing in opposite directions.Which of the arrows labeled A through D correctly represents the direction of the magnetic field due to the wires at a point located at an equal distance d from each wire? The figure shows two long wires carrying equal currents I<sub>1</sub> and I<sub>2</sub> flowing in opposite directions.Which of the arrows labeled A through D correctly represents the direction of the magnetic field due to the wires at a point located at an equal distance d from each wire? A) A B) B C) C D) D E) The magnetic field is zero at that point.


A) A
B) B
C) C
D) D
E) The magnetic field is zero at that point.

Correct Answer

verifed

verified

The figure shows the cross-section of a hollow cylinder of inner radius a = 5.0 cm and outer radius b = 7.0 cm.A uniform current density of 1.0 A/ cm2 flows through the cylinder parallel to its axis.Calculate the magnitude of the magnetic field at a distance of d = 10 cm from the axis of the cylinder. The figure shows the cross-section of a hollow cylinder of inner radius a = 5.0 cm and outer radius b = 7.0 cm.A uniform current density of 1.0 A/ cm<sup>2</sup> flows through the cylinder parallel to its axis.Calculate the magnitude of the magnetic field at a distance of d = 10 cm from the axis of the cylinder. A) 0.00 T B) 1.5 × 10<sup>-4</sup> T C) 2.5 × 10<sup>-4</sup> T D) 4.5 × 10<sup>-4</sup> T E) 0.50 × 10<sup>-4</sup> T The figure shows the cross-section of a hollow cylinder of inner radius a = 5.0 cm and outer radius b = 7.0 cm.A uniform current density of 1.0 A/ cm<sup>2</sup> flows through the cylinder parallel to its axis.Calculate the magnitude of the magnetic field at a distance of d = 10 cm from the axis of the cylinder. A) 0.00 T B) 1.5 × 10<sup>-4</sup> T C) 2.5 × 10<sup>-4</sup> T D) 4.5 × 10<sup>-4</sup> T E) 0.50 × 10<sup>-4</sup> T


A) 0.00 T
B) 1.5 × 10-4 T
C) 2.5 × 10-4 T
D) 4.5 × 10-4 T
E) 0.50 × 10-4 T

Correct Answer

verifed

verified

Two very long parallel wires in the xy-plane,a distance 2a apart,are parallel to the y-axis and carry equal currents I as shown in the figure.The +z direction points perpendicular to the xy-plane in a right-handed coordinate system.If the left current flows in the +y direction and the right current flows in the -y direction,which one of the graphs shown in the figure below best represents the z component of the net magnetic field,in the xy-plane,as a function of x? (Caution: These graphs are not magnetic field lines.) Two very long parallel wires in the xy-plane,a distance 2a apart,are parallel to the y-axis and carry equal currents I as shown in the figure.The +z direction points perpendicular to the xy-plane in a right-handed coordinate system.If the left current flows in the +y direction and the right current flows in the -y direction,which one of the graphs shown in the figure below best represents the z component of the net magnetic field,in the xy-plane,as a function of x? (Caution: These graphs are not magnetic field lines.) A) 1 B) 2 C) 3 D) 4 E) 5 Two very long parallel wires in the xy-plane,a distance 2a apart,are parallel to the y-axis and carry equal currents I as shown in the figure.The +z direction points perpendicular to the xy-plane in a right-handed coordinate system.If the left current flows in the +y direction and the right current flows in the -y direction,which one of the graphs shown in the figure below best represents the z component of the net magnetic field,in the xy-plane,as a function of x? (Caution: These graphs are not magnetic field lines.) A) 1 B) 2 C) 3 D) 4 E) 5


A) 1
B) 2
C) 3
D) 4
E) 5

Correct Answer

verifed

verified

Two long parallel wires carry currents of 10 A in opposite directions.They are separated by 40 cm.What is the magnitude of the magnetic field in the plane of the wires at a point that is 20 cm from one wire and 60 cm from the other? (μ0 = 4π × 10-7 T • m/A)


A) 1.5 µT
B) 3.3 µT
C) 6.7 µT
D) 33 µT
E) 67 µT

Correct Answer

verifed

verified

A long,straight wire with A long,straight wire with current flowing through it produces magnetic field strength at its surface.If the wire has a radius R,where within the wire is the field strength equal to of the field strength at the surface of the wire? Assume that the current density is uniform throughout the wire. A) 0.36 R B) 0.060 R C) 0.64 R D) 0.030 R current flowing through it produces magnetic field strength A long,straight wire with current flowing through it produces magnetic field strength at its surface.If the wire has a radius R,where within the wire is the field strength equal to of the field strength at the surface of the wire? Assume that the current density is uniform throughout the wire. A) 0.36 R B) 0.060 R C) 0.64 R D) 0.030 R at its surface.If the wire has a radius R,where within the wire is the field strength equal to A long,straight wire with current flowing through it produces magnetic field strength at its surface.If the wire has a radius R,where within the wire is the field strength equal to of the field strength at the surface of the wire? Assume that the current density is uniform throughout the wire. A) 0.36 R B) 0.060 R C) 0.64 R D) 0.030 R of the field strength at the surface of the wire? Assume that the current density is uniform throughout the wire. A long,straight wire with current flowing through it produces magnetic field strength at its surface.If the wire has a radius R,where within the wire is the field strength equal to of the field strength at the surface of the wire? Assume that the current density is uniform throughout the wire. A) 0.36 R B) 0.060 R C) 0.64 R D) 0.030 R


A) 0.36 R
B) 0.060 R
C) 0.64 R
D) 0.030 R

Correct Answer

verifed

verified

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


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

Correct Answer

verifed

verified

The figure shows two long,parallel current-carrying wires.The wires carry equal currents The figure shows two long,parallel current-carrying wires.The wires carry equal currents A in the directions indicated and are located a distance d = 0.5 m apart.Calculate the magnitude and direction of the magnetic field at the point P that is located an equal distance d from each wire. A) 8 µT downward B) 8 µT upward C) 4 µT downward D) 4 µT upward E) 4 µT to the right A in the directions indicated and are located a distance d = 0.5 m apart.Calculate the magnitude and direction of the magnetic field at the point P that is located an equal distance d from each wire. The figure shows two long,parallel current-carrying wires.The wires carry equal currents A in the directions indicated and are located a distance d = 0.5 m apart.Calculate the magnitude and direction of the magnetic field at the point P that is located an equal distance d from each wire. A) 8 µT downward B) 8 µT upward C) 4 µT downward D) 4 µT upward E) 4 µT to the right The figure shows two long,parallel current-carrying wires.The wires carry equal currents A in the directions indicated and are located a distance d = 0.5 m apart.Calculate the magnitude and direction of the magnetic field at the point P that is located an equal distance d from each wire. A) 8 µT downward B) 8 µT upward C) 4 µT downward D) 4 µT upward E) 4 µT to the right


A) 8 µT downward
B) 8 µT upward
C) 4 µT downward
D) 4 µT upward
E) 4 µT to the right

Correct Answer

verifed

verified

Two circular coils of diameter 30.0 cm are parallel to each other and have their centers along the same line L but separated by 22.0 cm.When an experimenter views the coils along L,the coil closer to her carries a clockwise current of 2.50 A.Find the magnitude and sense (clockwise or counterclockwise)of the current needed in the other coil so that the net magnetic field on L midway between the two coils will have a magnitude of 4.10 µT and point away from the experimenter who is viewing the coils along L. Two circular coils of diameter 30.0 cm are parallel to each other and have their centers along the same line L but separated by 22.0 cm.When an experimenter views the coils along L,the coil closer to her carries a clockwise current of 2.50 A.Find the magnitude and sense (clockwise or counterclockwise)of the current needed in the other coil so that the net magnetic field on L midway between the two coils will have a magnitude of 4.10 µT and point away from the experimenter who is viewing the coils along L.

Correct Answer

verifed

verified

0.633 A,co...

View Answer

As shown in the figure,a rectangular current loop is carrying current As shown in the figure,a rectangular current loop is carrying current = 3.0 A,in the direction shown,and is located near a long wire carrying a current .The long wire is parallel to the sides of the rectangle.The rectangle loop has length 0.80 m and its sides are 0.10 m and 0.70 m from the wire,as shown.We measure that the net force on the rectangular loop is and is directed towards the wire. (a)What is the magnitude of the current I<sub>w</sub>? (b)In which direction does I<sub>w</sub> flow: from top to bottom or from bottom to top in the sketch? = 3.0 A,in the direction shown,and is located near a long wire carrying a current As shown in the figure,a rectangular current loop is carrying current = 3.0 A,in the direction shown,and is located near a long wire carrying a current .The long wire is parallel to the sides of the rectangle.The rectangle loop has length 0.80 m and its sides are 0.10 m and 0.70 m from the wire,as shown.We measure that the net force on the rectangular loop is and is directed towards the wire. (a)What is the magnitude of the current I<sub>w</sub>? (b)In which direction does I<sub>w</sub> flow: from top to bottom or from bottom to top in the sketch? .The long wire is parallel to the sides of the rectangle.The rectangle loop has length 0.80 m and its sides are 0.10 m and 0.70 m from the wire,as shown.We measure that the net force on the rectangular loop is As shown in the figure,a rectangular current loop is carrying current = 3.0 A,in the direction shown,and is located near a long wire carrying a current .The long wire is parallel to the sides of the rectangle.The rectangle loop has length 0.80 m and its sides are 0.10 m and 0.70 m from the wire,as shown.We measure that the net force on the rectangular loop is and is directed towards the wire. (a)What is the magnitude of the current I<sub>w</sub>? (b)In which direction does I<sub>w</sub> flow: from top to bottom or from bottom to top in the sketch? and is directed towards the wire. As shown in the figure,a rectangular current loop is carrying current = 3.0 A,in the direction shown,and is located near a long wire carrying a current .The long wire is parallel to the sides of the rectangle.The rectangle loop has length 0.80 m and its sides are 0.10 m and 0.70 m from the wire,as shown.We measure that the net force on the rectangular loop is and is directed towards the wire. (a)What is the magnitude of the current I<sub>w</sub>? (b)In which direction does I<sub>w</sub> flow: from top to bottom or from bottom to top in the sketch? As shown in the figure,a rectangular current loop is carrying current = 3.0 A,in the direction shown,and is located near a long wire carrying a current .The long wire is parallel to the sides of the rectangle.The rectangle loop has length 0.80 m and its sides are 0.10 m and 0.70 m from the wire,as shown.We measure that the net force on the rectangular loop is and is directed towards the wire. (a)What is the magnitude of the current I<sub>w</sub>? (b)In which direction does I<sub>w</sub> flow: from top to bottom or from bottom to top in the sketch? (a)What is the magnitude of the current Iw? (b)In which direction does Iw flow: from top to bottom or from bottom to top in the sketch?

Correct Answer

verifed

verified

(a)1.2 A (...

View Answer

Showing 41 - 52 of 52

Related Exams

Exam 1

Units,physical Quantities,and Vectors

107 Questions

Exam 2

Motion Along a Straight Line

59 Questions

Exam 3

Motion in Two or Three Dimensions

50 Questions

Exam 4

Newtons Laws of Motion

44 Questions

Exam 5

Applying Newtons Laws

95 Questions

Exam 6

Work and Kinetic Energy

54 Questions

Exam 7

Potential Energy and Energy Conservation

55 Questions

Exam 8

Momentum,impulse,and Collisions

50 Questions

Exam 9

Rotation of Rigid Bodies

26 Questions

Exam 10

Dynamics of Rotational Motion

49 Questions

Exam 11

Equilibrium and Elasticity

50 Questions

Exam 12

Fluid Mechanics

50 Questions

Exam 13

Gravitation

50 Questions

Exam 14

Periodic Motion

50 Questions

Exam 15

Mechanical Waves

44 Questions

Exam 16

Sound and Hearing

65 Questions

Exam 17

Temperature and Heat

63 Questions

Exam 18

Thermal Properties of Matter

58 Questions

Exam 19

The First Law of Thermodynamics

52 Questions

Exam 20

The Second Law of Thermodynamics

50 Questions

Exam 21

Electric Charge and Electric Field

60 Questions

Exam 22

Gausss Law

41 Questions

Exam 23

Electric Potential

55 Questions

Exam 24

Capacitance and Dielectrics

52 Questions

Exam 25

Current,resistance,and Electromotive Force

55 Questions

Exam 26

Direct-Current Circuits

53 Questions

Exam 27

Magnetic Field and Magnetic Forces

42 Questions

Exam 29

Electromagnetic Induction

39 Questions

Exam 30

Inductance

27 Questions

Exam 31

Alternating Current

50 Questions

Exam 32

Electromagnetic Waves

47 Questions

Exam 33

The Nature and Propagation of Light

28 Questions

Exam 34

Geometric Optics

81 Questions

Exam 35

Interference

33 Questions

Exam 36

Diffraction

49 Questions

Exam 37

Relativity

51 Questions

Exam 38

Photons: Light Waves Behaving As Particles

38 Questions

Exam 39

Particles Behaving As Waves

52 Questions

Exam 40

Quantum Mechanics

43 Questions

Exam 41

Atomic Structure

53 Questions

Exam 42

Molecules and Condensed Matter

31 Questions

Exam 43

Nuclear Physics

90 Questions

Exam 44

Particle Physics and Cosmology

54 Questions

Show Answer