Electrical & Magnetic Forces Flashcards
(6 cards)
Electrical & Magnetic Forces
What does the field around a positively or negatively charged particle look like?
Debra’s Hint: Protions (+) Repel and Electrons (-) Attract.
(Optional to flip if needed)
The Diagram is in the Science Study Guide, but it’s showing the positive and negative charges.
Electrical & Magnetic Forces
What direction do charged particles move in an electrical or magnetic field?
Debra’s Hint: One way is in a straight line; One way is curved
(Optional to flip if needed)
In a Electric Field:
- Positive charges: (Protons) move toward the negative side
- Negative charges: (Electrons) move toward the positive side
- The direction is straight along the field line from high to low voltage
In a Magnetic Field:
- Charges particles curve instead of move in a straight line
- The direction in Protons is the Right-hand rule ( for positive charges) or Left-jand rule for negative charges
Electrical & Magnetic Forces
What is the difference between a conductor and an insulator?
Debra’s Hint: Materials when transferring electricity and heat
(Optional to flip if needed)
Conductors: Any material good at transfering low voltagen electricity and heat. (Examples include metals like copper, silver, and aluminum.)
Insulators: Any material poor at transferring electricity and heat. (Examples include rubber, plastic, glass, and wood.)
(IMPORTANT) Key Difference: In conductors, some electrons are not tightly bound and can move freely, facilitating the flow of electric current. In insulators, all electrons are tightly bound and cannot move freely.
Thermal Property:
Conductors are also typically good thermal conductors, meaning they allow heat to flow through them easily. Insulators are poor thermal conductors.
Electrical & Magnetic Forces
What factors will affect the strength of an electrical current in a wire?
(Im cooked)
You can flip the card! These factors still need to be memorized.
Definition: Resistence: Thin or Long wires have higher resistence, While thick and short wires have lower resistence.
Main Definitions: Resistor: Material that blocks the flow of charged particles but lets them through slowly. Voltage: Measure of how strong the flow of electrons is inside of a circuit of system.
Key Factors:
- Volatge: Higher voltage pushes more electrons, increasing current.
- Resistence: More resistence = less current and less resistence = more current.
- Wire material: Copper + Silver conduct electricity well (low resistence).
- High and Cold temperature: Increases resistence, reducing current. While cooler wires have better conductivity.
- Wire material: Rubber or glass block electricity (high resistence)
Definition: Resistence: Thin or Long wires have higher resistence, While thick and short wires have lower resistence.
Definition: Resistence: Thin or Long wires have higher resistence, While thick and short wires have lower resistence.
Main Definitions: Resistor: Material that blocks the flow of charged particles but lets them through slowly. Voltage: Measure of how strong the flow of electrons is inside of a circuit of system.
Electrical & Magnetic Forces
What does the magnetic field around a magnet look like?
https://www.nde-ed.org/Physics/Magnetism/fieldcreation.xhtml
The Diagram The Diagram is in the Science Study Guide, but it’s showing the north (positive) and south (negative) poles of a magnet.
https://www.nde-ed.org/Physics/Magnetism/fieldcreation.xhtml
(Remember) Earth’s geographic North Pole is a magnetic South pole while South pole is the North Pole.
Electrical & Magnetic Forces
What factors will affect the strength of an electromagnet?
(I’m cooked)
You can flip the card! These factors still need to be memorized.
Key Factors:
Number of Coils:
- More coils around the wire increases the magnetic field
- Ex. Coil with 100 turns is weak than 500 turns.
Current Strength:
- Higher electric current = stronger electromagnet
- More voltage increases the current, boosting the magnet strength
Type of Core:
- Using a stronger magnetic field material (like iron) inside the coil increaes power.
- Non-magnetic materials don’t help much
Wire Thickness:
- Thicker wires allow more current to flow, strengthing the electromagnet
- Thin wires limit current flow, making it weaker
Temperature:
- Extreme heat can weaken magnetism
- Cooler Temperatures help maintain strength
