We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byGary Wimbley
Modified over 2 years ago
HW7 due on Friday Turn in HW6 Stand by to receive back HW5 EXAM 2 coming up on Monday !!!!! March 30 th
Magnetic field due to a long (straight) wire: Let’s review:
current on ( I up ! ).
Right hand rule (#1)
( I up/out ! ). DIRECTION-OK MAGNITUDE???
Experiment shows: For a long straight wire
Example: Suppose a cable is carrying 100 A current. What’s the B-field 1 cm from the cable? How about 10 cm?
Example: The cables are each carrying 25 A out the of page. What’s at point Q? 13.0 cm Q
Example: The cables are carrying 25 A out the of page. What’s at point P? Superposition! Next … 13.0 cm P
P Example: The cables are each carrying 25 A out the of page. What’s at point Q?
P Now: Vector Superposition! Next …
Example: The cables are each carrying 25 A out the of page. What’s at point Q?
Forces between current-carrying conductors
Opposite Currents Repel!
Parallel Currents attract! (same magnitude as other case!)
Example: What force per unit length do two cables 1 cm apart produce on each other? (They’re carrying 50 A each.) How about at 10 cm?
What about currents perpendicular to each other? …
Fun example: Force/m?
Fun example: How much current do you need in the third wire so the net forces are zero?
Current Loop: up/out down/in Solenoids
Current LoopS: up/out down/in
Solenoid: up/out down/in
Example: What’s the B-field inside a coil with 50 turns/cm, running a current of 2 A?
Lecture 19-Wednesday March 11 Magnetic Forces on Moving Charges Mass Spectrometers.
Week 9 Presentation 1 Electromagnets 1. Learning Objectives: 1. Determine the magnitude and direction of the magnetic field strength generated by a straight.
STARTER Which way does the current point in this wire?
Currents and Magnetism Textbook Sections 22-4 – 22-7 Physics 1161: PreLecture 13.
Magnets and the magnetic field Electric currents create magnetic fields Magnetic fields of wires, loops, and solenoids Magnetic forces on charges and currents.
Phys 102 – Lecture 12 Currents & magnetic fields 1.
Magnetic Fields Faraday’s Law
STARTER Which way does the current point in this wire? Magnetic Forces, Fields, and Directions.
Two questions: (1) How to find the force, F on the electric charge, Q excreted by the field E and/or B? (2) How fields E and/or B can be created?
Chapter 30 - Magnetic Fields and Torque
Copyright © 2007, Pearson Education, Inc., Publishing as Pearson Addison-Wesley. Magnets and the magnetic field Electric currents create magnetic fields.
The wires are separated by distance a and carry currents I 1 and I 2 in the same direction. Wire 2, carrying current I 2, sets up a magnetic field B 2.
Conventional current: the charges flow from positive to negative electron flow: the charges move from negative to positive the “flow of electrons” Hand.
ConcepTest 29.1a Magnetic Field of a Wire I P If the currents in these wires have the same magnitude, but opposite directions, what is the direction.
The Magnetic Force Between Two Parallel Conductors AP Physics C Montwood High School R. Casao.
THE MAGNETIC FORCE BETWEEN TWO PARALLEL CONDUCTORS Lecture No.12 By. Sajid Hussain Qazi.
Chapter 29. Magnetic Field Due to Currents What is Physics? Calculating the Magnetic Field Due to a Current Force Between Two Parallel.
Currents and Magnetism
The force on a current-carrying wire A magnetic field exerts a force on a single moving charge, so it's not surprising that it exerts a force on a current-carrying.
Physics 106 Lesson #20 Magnetism: Relay and Buzzer Dr. Andrew Tomasch 2405 Randall Lab
© 2017 SlidePlayer.com Inc. All rights reserved.