Applied Physics (11th Edition)
11th Edition
ISBN: 9780134159386
Author: Dale Ewen, Neill Schurter, Erik Gundersen
Publisher: PEARSON
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Textbook Question
Chapter 18, Problem 4RQ
The unit used to express the strength of a magnetic field is the ______.
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An electromagnet has 500 turns, and a current of 2 amperes flows through it.
Calculate the magnetic field strength produced by the electromagnet using the
formula B = μ.nl (where B is the magnetic field strength, μ, is the permeability of free
space, n is the number of turns per unit length, and I is the current).
If an electric wire is allowed to produce a magnetic field no larger than that of the Earth (0.50×10−4T×10−4T) at a distance of 28 cmcm from the wire, what is the maximum current the wire can carry?
Express your answer to two significant figures and include the appropriate units.
I= ?
A vector representing a magnetic field has an x-component of 0.400 T (tesla) and a y-component of 0.162 T.What is the direction (in degrees) of the magnetic field with respect to the positive x-axis?
Chapter 18 Solutions
Applied Physics (11th Edition)
Ch. 18.2 - Find the magnetic field at 0.250 m from a long...Ch. 18.2 - Prob. 2PCh. 18.2 - What is the current in a wire if the magnetic...Ch. 18.2 - A power line runs northsouth carrying 675 A and is...Ch. 18.2 - Prob. 5PCh. 18.2 - Find the current in a wire if the magnetic field...Ch. 18.2 - A solenoid has 1000 turns of wire, is 0.320 m...Ch. 18.2 - A solenoid has 3000 turns of wire and is 0.350 m...Ch. 18.2 - A small solenoid is 0.150 m in length and 0.0150 m...Ch. 18.2 - A solenoid has 2500 turns of wire and is 0.200 m...
Ch. 18.2 - A long solenoid has 1000 turns and is 0.250 m...Ch. 18.2 - A small solenoid 0.100 m in length has 1000 turns...Ch. 18.2 - An auto mechanic wants to use a solenoid she found...Ch. 18.2 - An earthmover requires a solenoid with 2500 turns...Ch. 18 - The presence of a magnetic force field may be...Ch. 18 - The deflection of a compass needle placed near a...Ch. 18 - Ampres rule relates a. the strength of a magnetic...Ch. 18 - The unit used to express the strength of a...Ch. 18 - Describe how a strong magnetic field can be...Ch. 18 - Describe how to determine the direction of a...Ch. 18 - Describe how a magnetic field is induced by a...Ch. 18 - Describe how a generator produces current.Ch. 18 - Prob. 9RQCh. 18 - Describe how a motor works.Ch. 18 - What is a synchronous motor, and how does it work?Ch. 18 - Distinguish between a universal motor and an...Ch. 18 - Distinguish between an armature and a stator.Ch. 18 - Prob. 14RQCh. 18 - Prob. 15RQCh. 18 - Prob. 16RQCh. 18 - If the number of turns per inch in a solenoid were...Ch. 18 - Describe how to find the flux lines near a bar...Ch. 18 - How is alternating current produced by a...Ch. 18 - Find the magnetic field at 0.255 m from a long...Ch. 18 - Prob. 2RPCh. 18 - What is the current in a wire if the magnetic...Ch. 18 - A solenoid has 2000 turns of wire, is 0.452 m...Ch. 18 - A solenoid has 2750 turns of wire and is 0.182 m...Ch. 18 - A power line running northsouth carrying 500 A is...Ch. 18 - A ships compass is mistakenly placed 8.35 cm away...Ch. 18 - Figure 18.10 shows a compass near a...Ch. 18 - A coaxial cable consists of an inner conducting...Ch. 18 - Prob. 4ACCh. 18 - Prob. 5AC
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