1 Temperature And Heat 2 The Kinetic Theory Of Gases 3 The First Law Of Thermodynamics 4 The Second Law Of Thermodynamics 5 Electric Charges And Fields 6 Gauss's Law 7 Electric Potential 8 Capacitance 9 Current And Resistance 10 Direct-current Circuits 11 Magnetic Forces And Fields 12 Sources Of Magnetic Fields 13 Electromagnetic Induction 14 Inductance 15 Alternating-current Circuits 16 Electromagnetic Waves Chapter13: Electromagnetic Induction
Chapter Questions Section: Chapter Questions
Problem 13.1CYU: Chek sour Understanding A closely und coil has a radius of 4.0 cm. 50 turns, and a total ieslstancc... Problem 13.2CYU: Check ‘sour Und.rtanding Find the dhectlon of the hiduced cunent n the wire loop shoii below as the... Problem 13.3CYU: Check Your UnderstAnding Verify the directions of the induced cuffents in Figure Figure 133 (a)Qosig... Problem 13.4CYU: Check Your Understanding Shown below is a rod of length l that is rotated counterclockwise around... Problem 13.5CYU: Check Your Understanding A rod of length 10cm moves at aspeed of 10 m/sperpendicularly though a... Problem 13.6CYU: Check Your understanding Suppose that the coil of Example 13.2 is a square rather than circular. Can... Problem 13.7CYU: Check Your Understanding What Is the magnitude of the induced electric field in Example 13.8 at t=0... Problem 13.8CYU: Check your Understanding Themagneticfield shown below Is confined to the cylindrical region shown... Problem 13.9CYU: Check Your Understanding A long solenoid of cross-section area 5.0 cm2is wound with 25 turns of wire... Problem 1CQ: A stationary coil is in a magnetic field that is changing with time. Does the emf induced in the... Problem 2CQ: In Faraday’s experiments, what would be the advantage of using coils with many turns? Problem 3CQ: A copper ring and a wooden ring of the same dimensions are placed in magnetic fields so that there... Problem 4CQ: Discuss the factors determining the induced emf in a :losed loop of wire. Problem 5CQ: a. Does the induced emf in a circuit depend on the resistance of the circuit? (b) Does the induced... Problem 6CQ: How would changing the radius of loop D shown below affect its emf, assuming C and D are much closer... Problem 7CQ: Can there be an induced emf in a circuit at an instant when the magnetic flux through the circuit is... Problem 8CQ: Does the induced emf always act to decrease the magnetic flux through a circuit? Problem 9CQ: How would you position a flat loop of wire in a changing magnetic field so that there is no Induced... Problem 10CQ: The normal to tt plane of a single-turn conducting loop is directed at an angle to a spatially... Problem 11CQ: The circular conducting loops shown in the accompanying figure are parallel, perpendicular to the... Problem 12CQ: The north pole of a mag’iet is moved toward a copper loop, as shown below. If you are looking at the... Problem 13CQ: The accompanying figure shows a conducting ring at various positions as It moves througli a magnetic... Problem 14CQ: Show that and dm/dt have the same units. Problem 15CQ: State the direction of the induced current for each case shown be1o obseMng from the sick of the... Problem 16CQ: A bar magnet falls under the influence of gravity along the axis of a long copper tube. If air... Problem 17CQ: Around the geographic North Pole (or magnetic South Pole), Earth’s magnetic field is almost... Problem 18CQ: A wire loop moves translationally (no rotation) in a uniform magnetic field. Is there an emf induced... Problem 19CQ: Is the work required to accelerate a rod from rest to a speed v in a magnetic field greater than the... Problem 20CQ: The copper sheet shown below is partially in a magnetic field. When it is pulled to the right, a... Problem 21CQ: A conducting sheet lies in a plane perpendicular to a magnetic field B that is below the sheet. If B... Problem 22CQ: Electromagnetic braking can be achieved by applying a strong magnetic field to a pinning metal disk... Problem 23CQ: A coil is moved through a magnetic field as shown below. The field is uniform inside the rectangle... Problem 24P: A 50-turn coil has a diameter of 15 cm. The coil is placed in a spatially uniform magnetic field of... Problem 25P: Repeat your calculations of the preceding problem’s time of 0.1 s with the plane of the coil making... Problem 26P: A square loop whose sides are 6.0-cm long is made with copper wire of radius 1.0 mm. If a magnetic... Problem 27P: The magnetic field through a circular loop of radius 10.0 cm varies with time as shown below. The... Problem 28P: The accompanying figure shows a single-turn rectangular coil that has a resistance of 2. . The... Problem 29P: How would the answers to the preceding problem change if the coil consisted of 20 closely spaced... Problem 30P: A long solenoid with n= 10 turns per centimeter has a cross-sectional area of 5.0 cm2and carries a... Problem 31P: A rectangular wire loop with length a and width b lies in the xy-plane, as shownbelow. Within the... Problem 32P: The magnetic field perpendicular to a single sire loop of diameter 10.0 cm decreases fron 0.50 T to... Problem 33P: A single-turn circular loop of wire of radius 50 mm lies in a plane perpendicular to a spatially... Problem 34P: When a magnetic field is first turned on, t1 flux through a 20-turn loop varies with time according... Problem 35P: The magnetic flux through the loop shown in the accompanying figure varies with time according to... Problem 36P: Use Lenz’s law to determine tl direction of induced current in each case. Problem 37P: An automobile with a radio antenna 1.0 m long travels at 100.0 km/h in a location where theEarth’s... Problem 38P Problem 39P: Suppose the magnetic field of the preceding problem oscillates with time according to B=B0sint .... Problem 40P: A coil of 1000 turns encloses an area of 25 cm2. It is rotated in 0.010 s from a position where its... Problem 41P: In the circuit sho in the accompanying figure, the rtd slides along the conducting rails at a... Problem 42P: The rod shown in the accompanying figure is moving through a uniform magnetic field of strength... Problem 43P: A 25-cm nod moves at 5.0 m/s in a plane perpendicular to a magnetic field of strength 0.25 T. The... Problem 44P: In the accompanying figure, the rails, connecting end piece, and rod all have a resistance per unit... Problem 45P: The rod shown below moves to the right on essentially zero-resistance rails at a speed v=3.0m/s . If... Problem 46P: Shown below is a conducting rod that slides along metal rails. The apparatus is in a uniform... Problem 47P: Calculate the induced electric field in a 50-tuni coil with a diameter of 15 cm that is placed in a... Problem 48P: The magnetic field through a circular loop of radius 10.0 cm varies with time as shown in the... Problem 49P: The current I through a long solenoid with n trims per meter and radius R is changing with time as... Problem 50P: Calculate the electric field induced both inside and outside the solenoid of the preceding problem... Problem 51P Problem 52P: The magnetic field at all points within the cylindrical region whose cross-section is indicated in... Problem 53P: The current in a long solenoid of radius 3 cm is varied with time at a rate of 2 A/s. A circular... Problem 54P: The current in a long solenoid of radius 3 cm and 20 turns cm is varied with time at a rate of 2... Problem 55P: Design a current loop that, when rotated in a uniform magnetic field of strength 0.10 T, will... Problem 56P: A flat, square coil of 20 turns that has sides of length 15.0 cm is rotating in a magnetic field of... Problem 57P: A 50-turn rectangular coil with dimensions 0.15m0.40m rotates in a uniform magnetic field of... Problem 58P: The square armature coil of an alternating current generator has 200 turns and is 20.0 cm on side.... Problem 59P: A flip coil is a relatively simple device used to measure a magnetic field, It consists of a... Problem 60P: The flip coil of the preceding problem has a radius of 3.0 cm and is wound with 40 turns of copper... Problem 61P: A 120-V, series-wound motor has a field resistance of 80 and an armature resistance of 10. When it... Problem 62P: A small series-wound dc motor is operated from a 12-V car battery. Under a normal load, the motor... Problem 63AP: Shown in the following figure is a long, straight wire and a single-turn rectangular loop, both of... Problem 64AP: A metal bar of mass 500 g slides outward at a constant speed of 1.5 cm/s over two parallel rails... Problem 65AP: A current is induced in a circular loop of radius 1.5 cm between two poles of a horseshoe... Problem 66AP: A metal bar of length 25 cm is placed perpendicular to a uniform magnetic field of strength 3 T. (a)... Problem 67AP: A coil with 50 turns and area 10cm2 is oriented with its plane perpendicular to a 0.75-T magnetic... Problem 68AP: A 2-turn planer loop of flexible wire is placed inside a long solenoid of n turns per meter that... Problem 69AP: The conducting rod shown in the accompanying figure moves along parallel metal rails that are 25-cm... Problem 70AP: A circular loop of wire of radius 10 cm is mounted on a vertical shaft and rotated at a frequency of... Problem 71AP: The magnetic field between the poles of a horseshoe electromagnet is uniform and has a cylindrical... Problem 72AP: A long solenoid of radius a with n turns per unit length is carrying a time-dependent current... Problem 73AP: A 120-V, series-wound dc motor draws 0.50 A from its power source when operating at full speed, and... Problem 74AP: The armature and field coils of a series-wound motor have a total resistance of 3.0 . When connected... Problem 75CP: A copper wire of Length I is fashioned into a circular coil with N turns. When the magnetic field... Problem 76CP: A 0.50-kg copper sheet drops through a uniform horizontal magnetic field of 1.5 T, and it reaches a... Problem 77CP: A circular copper disk of radius 7.5 on rotates at 2400 rpm around the axis through its center and... Problem 78CP: A short rod of length a moves with its velocity vparallel to an infinite wire carrying a current I... Problem 79CP: A rectangular circuit containing a resistance R is pulled at a constant velocity V away from a long,... Problem 80CP: Two infinite solenoids cross the plane of the circuit as shown below. The radii of the solenoids are... Problem 81CP: An eight-turn coil is tightly wrapped around the outside of the long solenoid as shown below. The... Problem 82CP: Shown below is a long rectangular loop of width w, length l, mass m, and resistance R. The loop... Problem 83CP: A square bar of mass m and resistance R is sliding without friction down very long, parallel... Problem 84CP: The accompanying figure shows a metal disk of inner radius r1 and other radius r2 rotating at an... Problem 85CP: A long solenoid with 10 turns per centimeter is placed inside a copper ring such that both objects... Problem 86CP: The current in the long, straight wire shown in the accompanying figure is given by, where I=I0sint... Problem 87CP: A 500-turn coil with a 0.250m2 area is spun in Earth’s 5.00105T magnetic field, producing a 12.0-kV... Problem 88CP: A circular loop of wire of radius 10 cm. is mounted on a vertical shaft and rotated at a frequency... Problem 89CP: A long solenoid of radius a with n turns per unit length is carrying a tune-dependent current... Problem 90CP: A rectangular copper loop of mass 100 g and resistance 0.2 is in a region of uniform magnetic field... Problem 91CP: A metal bar of mass m slides without friction over two rails a distance D apart in the region that... Problem 92CP: A time-dependent uniform magnetic field of magnitude B(t) is confined in a cylindrical region of... Problem 30P: A long solenoid with n= 10 turns per centimeter has a cross-sectional area of 5.0 cm2and carries a...
Related questions
Concept explainers
An electromagnet is used to support a solid piece
Interaction between an electric field and a magnetic field.
Expert Solution
Given Data:
The force required to support the weight is, F =10,000 N
The cross-sectional area of the magnetic force is, A =0.01 m2
The number of turns on the coil is, N =1000
The displacement is, x =1.0 mm
The expression for the current for a force to require the support is,
Here, ϕ is the magnetic flux, and R gap is the variable reluctance of the air gap.
The variable reluctance of the air gap is calculated as,
Step by step
Solved in 2 steps with 4 images
UNLOCK THE REST
