All Flashcards
What are the steps to determine the direction of magnetic force using the Right-Hand Rule (RHR)?
- Point thumb in the direction of the positive charge's velocity. 2. Point fingers in the direction of the magnetic field. 3. Palm shows the direction of the force.
What are the conditions for a charged particle to experience a magnetic force?
- The object must be charged (q ≠ 0). 2. The particle must be moving (v ≠ 0). 3. There must be a magnetic field present (B ≠ 0). 4. The particle's velocity and the magnetic field must have a perpendicular component.
Compare how electric and magnetic fields are used in cathode ray tubes.
Electric fields: Used for horizontal steering. | Magnetic fields: Used for vertical steering.
What is the difference in using the right hand rule for positive and negative charges?
Positive charges: Use the right-hand rule directly. | Negative charges: Use the right-hand rule and reverse the force direction, or use your left hand.
Define magnetic field lines.
Lines that show the direction a north pole would be pushed or pulled in a magnetic field.
Define magnetic field strength (B).
The strength of a magnetic field, measured in Teslas (T), where 1 T = 1 Ns/Cm.
Define Tesla (T).
The unit of magnetic field strength, equivalent to 1 Ns/Cm.
Define the Right-Hand Rule (RHR) in the context of magnetic forces.
A method to determine the direction of the magnetic force on a positive moving charge: thumb = velocity, fingers = magnetic field, palm = force.
Define velocity selector.
A device that uses perpendicular electric and magnetic fields to select particles with a specific velocity.
Define mass spectrometer.
A device that uses electric and magnetic fields to determine the mass of particles by measuring the radius of their circular path in a magnetic field.