All Flashcards
What is the key difference between gravity and electromagnetic forces?
Gravity: Affects objects regardless of distance and mass. | Electromagnetism: Includes magnetic forces and arises from interactions between charged objects or magnets.
What is the difference in the direction of force on a positive charge versus a negative charge in a magnetic field?
Positive Charge: The force direction is given directly by the right-hand rule (direction of the palm). | Negative Charge: The force direction is opposite to that given by the right-hand rule (opposite the direction of the palm).
How do you determine the direction of magnetic force on a positive charge using the right-hand rule?
- Point your thumb in the direction of the charge's velocity (v). 2. Point your fingers in the direction of the magnetic field (B). 3. Your palm indicates the direction of the magnetic force (F).
How do you determine the direction of magnetic force on a negative charge using the right-hand rule?
- Point your thumb in the direction of the charge's velocity (v). 2. Point your fingers in the direction of the magnetic field (B). 3. The opposite direction of your palm indicates the direction of the magnetic force (F).
Label the magnetic dipole diagram: field lines around a magnet.
1: North Pole, 2: South Pole, 3: Magnetic Field Lines (emerging from North, converging at South)
Label the right-hand rule diagram.
1: Thumb (Velocity, v), 2: Fingers (Magnetic Field, B), 3: Palm (Force, F, for positive charge)