- #1
tsang
- 15
- 0
Can anybody help me that how to work out the direction of Lorentz Force? Should I work out from the formula? Thanks.
Calculating Lorentz Force: Is the Formula the Answer?
- Thread starter tsang
- Start date
-
- Tags
- Force Formula Lorentz Lorentz force
AI Thread Summary
The Lorentz force can be calculated using the formula F = q(E + v x B), which accounts for both electric and magnetic forces. For a positive test charge, the electric force aligns with the direction of the electric field. The magnetic force is determined by the cross product of the charge's velocity and the magnetic field direction. This combination of forces defines the overall Lorentz force acting on the charge. Understanding these components is essential for experiments like measuring the electron charge to mass ratio.
- #2
Bob S
- 4,662
- 8
- #3
Born2bwire
Science Advisor
Gold Member
- 1,780
- 24
The equation gives the directions.
\mathbf{F} = q \left( \mathbf{E} + \mathbf{v}\times\mathbf{B} \right)
For a positive test charge there is an electric force in the direction of the applied electric field. There is also a force in the direction of the curl of the charge's velocity and the applied magnetic field. Together these define the Lorentz force.
\mathbf{F} = q \left( \mathbf{E} + \mathbf{v}\times\mathbf{B} \right)
For a positive test charge there is an electric force in the direction of the applied electric field. There is also a force in the direction of the curl of the charge's velocity and the applied magnetic field. Together these define the Lorentz force.
So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
It may be shown from the equations of electromagnetism, by James Clerk Maxwell in the 1860’s, that the speed of light in the vacuum of free space is related to electric permittivity (ϵ) and magnetic permeability (μ) by the equation: c=1/√( μ ϵ ) .
This value is a constant for the vacuum of free space and is independent of the motion of the observer. It was this fact, in part, that led Albert Einstein to Special Relativity.
Similar threads
Hot Threads
-
I Explain Bernoulli at the molecular level?
- Started by user079622
- Replies: 251
- Classical Physics
-
B Simple mass/scale puzzle
- Started by DaveC426913
- Replies: 206
- Classical Physics
-
I Solving a momentum problem where masses change after the collision
- Started by rdemyan
- Replies: 35
- Classical Physics
-
B Torque Calculation - Not a basic application
- Started by TeeBeeCee
- Replies: 37
- Classical Physics
-
B Formal definition of work done
- Started by physicals
- Replies: 48
- Classical Physics
Recent Insights
-
Insights Quantum Entanglement is a Kinematic Fact, not a Dynamical Effect
- Started by Greg Bernhardt
- Replies: 7
- Quantum Physics
-
Insights What Exactly is Dirac’s Delta Function? - Insight
- Started by Greg Bernhardt
- Replies: 0
- General Math
-
Insights Relativator (Circular Slide-Rule): Simulated with Desmos - Insight
- Started by Greg Bernhardt
- Replies: 1
- Special and General Relativity
-
Insights Fixing Things Which Can Go Wrong With Complex Numbers
- Started by PAllen
- Replies: 7
- General Math
-
Insights Fermat's Last Theorem
- Started by fresh_42
- Replies: 91
- General Math
-
Insights Why Vector Spaces Explain The World: A Historical Perspective
- Started by fresh_42
- Replies: 0
- General Math