Laws & Electric Potential (U7)
Charging Methods & Units (U7)
Series v. Parallel Concepts (U8)
Circuit Solving (U8)
Magnetism & Energy Conversions (U9)
100
What law is this equation representing?
Coulomb's Law, determines Electrostatic Force.
100
If two surfaces rub across each other and one of them gains electrons, this is charging by _____.
Friction
100
How many pathways does a SERIES circuit allow current to flow?
ONE single pathway.
All components in a series circuit are connected end-to-end, meaning the same current passes sequentially through every component.
100
DRAW OUT BOTH OF OUR CIRCUIT SOLVING TRIANGLES.
lol
100
A student has a coil of wires wrapped around an iron nail. She plugs two end of the wire up to the battery. What has she new created?
An electromagnet.
200
TRUE or FALSE?
BOTH Gravitational and Electrostatic Force can Repel?
FALSE, only Electrostatic Force can both attract and repel, determined by the charges. Gravity can ONLY and always will attract.
200
Name the Charging method: Bringing a charged rod near my Van De Graff but NOT touching?
Induction
NOT TOUCHING
200
If I have 3 lights in a PARALLEL circuit, and the first light goes out, what will happen to light 1 & 2?
They will remain on!
The lights will remain lit and continue to function normally with the same brightness. Because each bulb has its own independent path to the voltage source.
200
Solve for all 3 Voltages in this circuit.
And POWER for R3.
V of R1 = 60 v
V of R2 = 30 v
V of R3 = 30 v
Power of R3 = 60 W
200
A MOTOR converts ____ energy, into _____ energy?
Electrical, Mechanical
We have to Power a motor in order for it to work! Think of when we plugged it up to the battery and hand crank generator.
300
Electrostatic force is directly proportional to ______ and inversely proportional to ________.
Charges, Distance (squared)
300
This is a method of electrostatically charging a neutral conductor by bringing it into direct physical contact with a charged object.
Conduction
300
What do AC and DC stand for, in regards to current?
AC = Alternating Current
DC = Direct Current
Alternating current (AC) reverses direction and is used to deliver power to homes. While direct current (DC) flows consistently in one direction and is used to power batteries and electronic devices.
300
I have 2 lights wired in a Series circuit powered by a 12v battery, the resistances of lights are 3 ohms and 3 ohms. Find Voltages of both lights, V1? V2?
V1: 6v
V2: 6v
300
True or False, I can create an electromagnetic field by passing a current though a coil of wires.
TRUE, When you create a complete circuit that allows current to flow. The moving charges in the current will create magnetic fields.
400
Where would I place a +2nC to make my EPE Highest?
Charge A. If we want out potential to be highest, we want out charges to move the most. By placing it at A, near the POS plate, the POS +2 charge will want to move the most there.
400
Fill in the Blanks:
The unit for Voltage is Volts, which is V.
The unit for _____ is Amps, which is A.
The unit for Resistance is ____, which is __.
The unit for _____ is Watts, which is W.
Current, Ohms, OMEGA, Power
400
True of False? In a PARALLEL circuit I will add the resistances together to find my TOTAL Resistance?
FALSE, we use the reciprocal rule in a parallel circuit.
You are not forced to, you can use Ohms law to find Resistances if applicable.
400
If I have a 1124 Ohm, night light in my room powered by a 120v outlet. How much power is being omitted?
12.8 Watts of Power
I = 120/1124 = .10676 (I Current)
P = .10676 * 120v = 12.8 W
400
What are ways that we can increase the force of our electromagnetic field? (3)
Add more coils of wire
Add more batteries = more voltage/more current
Add an iron core
500
Rank the figures, rank the charges from LOWEST to HIGHEST Electric Potential Energy?
From Lowest EPE to Highest EPE
2 - 4 - 1 - 3
500
NAME ALL THE COMPONENTS in order.
Switch, Fuse, Resistor (Light, Motor, anything that uses energy), Battery
500
The job of these TWO things is to protect electrical circuits from overloads and short circuits by stopping the flow of electricity.
Fuses (Lights, Cars) and Circuit Breakers (House, Buildings)
Fuses melt and must be replaced, while breakers are resettable switches.
500
Solve the Parallel Circuit.
V1 = 6 I1 = 1 R1 = 6
V2 = 6 I1 = .5 R2 = 12
V3 = 6 I3 = 1.5 R3 = 4
VT = 6 IT = 3 RT = 2
500
Write an energy flowchart of the energy conversions that happen when we start a gravity light. (Starting from the bag in the air)
GPE -> GE -> ME -> EE
We start with gravitational potential energy as we have the bag hanging, then when dropped it is converted to gravitational energy. This causes our gears to spin, ie mechanical energy. These gears spinning causes our dc generator inside the gravity to create electricity, ie Electrical Energy.