Electric Charges and its movement
The tiny building blocks of everything
Atoms
What is the charge of each subatomic particle
Proton
Neutron
Electron
Proton: Positive
Neutron: Neutral
Electron: Negative
This subatomic particle flows through the wire when an electric field is present.
Electron
This is a measure of the amount of electrical energy or power transferred by an electric charge as it moves through a circuit.
Voltage
What is the equation that solves for the force of electrical attraction or repulsion of two point charges.
Coulombs Law
What is the charge when there is the same number of positive particles as negative particles?
Neutral
Where can you find these subatomic particles?
Proton
Neutron
Electron
Proton and Neutron: In the nucleus
Electron: Outside the nucleus, electron orbitals, electron cloud....
What are the two paths or types of circuits in which electric charges can flow
(you should have two answers)
Series Circuit
Parallel Circuit
What is the name of a material that opposes the flow of electrons?
What is the name of a material that allows the flow of electrons?
Insulators
Conductors
What remains the same ALWAYS in a series circuit?
The current
What are electrons in motion called?
Electricity
I will accept current too
True or False:
1) A neutral object is not attracted to a neutral object
2) A positively charged object repels a negatively charged object
3) A negatively charged object repels a neutrally charged object
4) A positively charged object attracts a negatively charged object
1) True
2) False
3) False
4) True
Electrons flow from the ______ terminal to the ________ terminal. (think about a battery)
Negative to positive
What are the definitions of the following....
1) Resistance
2) Voltage
3) Current
1) The opposition to the flow of electrons
2) The amount of "push" or force that electrons experience
3) How many electrons flow through an area over a certain amount of time
Explain how you could make the magnetic force between two magnets weaker and stronger W/OUT changing the charge of them?
Bring the magnets further apart to make it weaker and closer to make it stronger
When the positive and negative charges no longer balance. This is when negative charges are built up much more than positive.
Static Electricity
What are the three ways that electrons can be transferred/moved?
Define each one...
Friction: Rubbing two objects together can cause one object to lose electrons and the other to gain them
Induction: A charged object is brought near, but does not touch, a neutral object and electrons are moved
Conduction: One object starts off neutral, the other object starts off charged (either positive or negative) They must touch each other and their charges will transfer.
The flow of electrons travel (easier/worse/the same) when the length of the the wire increases and its diameter decreases....
worse
-write Ohms Law
-list each component in the equation
-list each unit for each component in the equation
V=IR
voltage=(current)(resistance)
volts=(amps or amperes)(ohms)
A series circuit has 3 resistors, the first is 2 ohms, the second is 4 ohms, and the third is 6 ohms. There is a 12V battery attached to these resistors.
a. Calculate the total resistance
b. Calculate the total current
c. Calculate the voltage drop off for each resistor
a. 12 ohms
b. 1 A
c. V_1= 2V V_2= 4V V_3=6V
This flow of electrons always travels from the _______ side of the battery to the _______ side.
Negative
Positive
Explain how lightening occurs...
Warm front meets cold front
Positive charges form towards the top, negative charges near bottom of cloud
Build up of static electricity is attracted to the positive charges on earths surface and BAM!!!!
The voltage drop off is directly proportional to what in the circuit?
The value of the resistance for the resistor.
When the resistance increases, the voltage drop of increases
A series circuit has 5 resistors, all have the same resistance. The total resistance equals 30 ohms and the battery attached to them is a 10 volt battery. What is the current in each of the 5 resistors?
I1-I5 = 0.3A
What is Ohms law equation and Coulombs law equation?
Then list what each part of both equations represent.
V=IR (voltage=current x time)
Fe=q1q2/d^2 (electrostatic force= charge of 1 point x charge of another point/ the distance between them squared)