All Flashcards
What is the effect of a magnetic force on a moving charged particle?
The magnetic force causes the particle to curve because the force is always perpendicular to the velocity.
What happens when a charged particle moves perpendicular to a uniform magnetic field?
The particle undergoes uniform circular motion (UCM).
What is the effect of balancing electric and magnetic forces on a charged particle?
Particles with a specific velocity can be selected.
What happens when charged particles from the sun interact with Earth's magnetic field?
The aurora borealis (northern lights) and aurora australis (southern lights) are created near the poles.
What is the effect of a magnetic field on electrons in a cathode ray tube?
The magnetic field can steer the electrons vertically.
What is the effect of an electric field on electrons in a cathode ray tube?
The electric field can steer the electrons horizontally.
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.
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.