All Flashcards
What are the steps to determine the direction of magnetic force using the Right-Hand Rule for positive charges?
- Point your thumb in the direction of the positive charge's velocity. 2. Point your fingers in the direction of the magnetic field. 3. Your palm will show the direction of the force.
What are the steps to determine the direction of magnetic force using the Right-Hand Rule for negative charges?
- Point your thumb in the direction of the negative charge's velocity. 2. Point your fingers in the direction of the magnetic field. 3. Your palm will show the direction of the force. 4. Reverse the direction of the force.
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.
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.