37925036
Description
Flashcards by Jessica Michaels, updated more than 1 year ago
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Created by Jessica Michaels
about 2 years ago
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| Question | Answer |
| Electric field | A region in which an object experiences a force, owing to the object being charged |
| Electric field lines map the path of... | Positive charges |
| Electric charge symbol | Q |
| Electric charge unit | C (coulomb) |
| Electric field strength unit | NC^-1 |
| Electric field strength | A vector quantity that has the same direction as the charge's force (F) |
| Electric potential energy | The energy that is needed to move a charge against an electric field |
| Voltage/electrical potential difference | The measure of specific potential energy (potential energy per unit charge) between two locations |
| Increasing supplied voltage between two parallel plates will... | Increase electric field strength |
| Decreasing plate separation will... | Increase electric field strength |
| Conductor | A material or object that permits an electric current to flow easily |
| Electric current | Movement/flow of electric charges in a circuit |
| Current symbol | I |
| Current unit | A |
| Circuit | A closed loop that electrons can travel in. A source of electricity, such as a battery, provides electrical energy in the circuit |
| Resistance | Quantity that describes how much an electrical component restricts the flow of current |
| Resistance is... | Directly proportional to the wire's length and inversely proportional to cross-sectional areas of the wire |
| In a series circuit | - Current is the same through all components - Voltage adds up to the supply - Resistors combine to give more resistance |
| In a parallel circuit | - Current adds up to the supply - Voltage is the same across all components - Resistors combine to give less resistance |
| Like poles and charges... | Repel |
| Unlike poles and charges... | Attract |
| Magnetic field lines | Exist in the space around a magnetized object because other magnetic objects experience a force near the first magnetized object |
| Magnetic field symbol | B |
| Magnetic field strength unit | T (tesla) |
| Right-hand grip rule | -Magnetic field in direction of fingers -Current in direction of thumb -Direction of M.F is direction of curled fingers |
| Right-hand slap rule | -Direction of the current is the direction of the thumb -Direction of field is fingers -Palm is direction of force |
| A wire experiences a force when... | A current carrying wire is placed close to another magnet |
| Electromagnetic induction | When a force moves a wire through a magnetic field, voltage is induced across the ends of the wire |
| Lenz's law | The direction of the induced current always opposes the change producing it - results in the conservation of energy |
| A larger voltage is induced if | -The magnet is stronger -The magnet is moved faster -There are more turns of wire -The solenoid has a soft iron core |
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