Upload
connor
View
44
Download
0
Tags:
Embed Size (px)
DESCRIPTION
CH 8: Magnetic Fields. 8.5 – Applications of Electric and Magnetic Fields. Agenda. Quiz Lesson on Section on 8.5 Lots of Video’s Story Time. Cyclotron Particle Accelerator. http:// www.youtube.com/watch?v=cNnNM2ZqIsc TRIUMF National laboratory in Vancouver has the largest cyclotron at 18m. - PowerPoint PPT Presentation
Citation preview
CH 8: Magnetic Fields
8.5 – Applications of Electric and Magnetic Fields
Agenda Quiz
Lesson on Section on 8.5
Lots of Video’s
Story Time
Cyclotron Particle Accelerator http://
www.youtube.com/watch?v=cNnNM2ZqIsc
TRIUMF National laboratory in Vancouver has the largest cyclotron at 18m
Use of Magnetic Fields in Cyclotrons
Particles moving in a cyclotron are subjected to a uniform magnetic field which causes the particles to move in a circular path.Each time the charged particle enters a Dee it follows a semi-circular path and each time it traverses to the other Dee its speed is greater than before as it is subjected to an Electric field. Its energy has increased by W=qV.
Use of Magnetic Fields in Cyclotrons
The period of the charged particle is independent of its speed, this can be shown by the following,
Use of Magnetic Fields in Cyclotrons
The Kinetic Energy can be found by,
Use of Magnetic Fields in Cyclotrons
Example, A cyclotron is used to accelerate dueterons (q = 1.6 x 10-19C) of
mass 3.34 x 10-27 kg. The radius of the cyclotron is 30cm and the magnetic field applied to it has strength 1.6T. Find
(a)The period of the particles in their circular path.(b)The energy (in eV) of the particles leaving the cyclotron.
Use of Magnetic Fields in Cyclotrons
(a)The period of the particles in their circular path.
s
qBmT
8
19
27
102.8 6.1106.1
1034.32
2
Use of Magnetic Fields in Cyclotrons
(b) The energy (in eV) of the particles leaving the cyclotron.
MeVeV
J
mrBqK
52.5 1052.5
106.1108.83
eV into change1083.8
1034.32)3.0()6.1()106.1(
2
6
19
13-
13
27
22219
222
Life without Electricity http://www.youtube.com/watch?v=JzhGv
W5OH28
Motors and Generators http://www.youtube.com/watch?v=d_aT
C0iKO68
DC Motors http://www.youtube.com/watch?v=OncV
RVwbAOA
RFID Chips (Radio-Frequency Identification
Technology)
http://www.youtube.com/watch?v=MAA9JpGraoU
Technology that uses microchips that act as a transmitters and responders to communicate data by radio waves
Magneto-rheological Fluid (MR Fluid)
A fluid containing suspended iron particles that, when subjected to a magnetic field, changes to a solid
Changes state from solid to liquid and back using a magnetic field
MR Fluid Dampers http://
www.youtube.com/watch?v=SBXQ-6uI8GY
When in liquid form, can absorb shockwaves and reduce potential damage such as during Earthquakes
Used in:Shock absorbersWashing MachinesProstheticsExercise Equipment
High-Voltage Power Lines http://www.youtube.com/watch?v=9tzga
6qAaBA
MRI (Magnetic Resonance Imaging) http://
www.youtube.com/watch?v=H0adTNhzGxU
Hydrogen atoms in the body align themselves either in the direction of or opposite to the magnetic field
MRI device sends a regularly repeating radio frequency pulse, which causes the atoms to emit a regular energy signal which is detected by the scanner
Homeworkpg. 409 #10
• research the topic• answer the question in 250 words or less
(include 1-2 APA sources/references) • Hand in tomorrow