Chargessss (Static)
What are the charges of a proton, electron, neutron.
Proton – positive
Electron – negative
Neutron – neutral
What is static electricity and current electricity
Static electricity- when energy builds up on the surface of a material
Current electricity- the movement of electric current through circuit
In a circuit which direction does electrons flow?
Through the right of the circuit out of the negative bar of the cell.
After removing the laundry from the clothes dryer, you noticed that a wool sock is sticking to a cotton shirt explain what happened using the concepts from static electricity.
In a laundry machine due to the tumbling of clothing inside of it, it causes clothing to rub against one another, and creates friction between certain articles of clothing. Therefore, causing the wolf sock and cotton shirt to be charged, which then whichever material has a strong stronger hold on electrons will become negative and the other positive making them attract.
Only blank can move between objects when being charged
Electron
What are the three laws of electric charges
1. Opposite charges attract.
2. Like charges repel.
3. charged attract neutral.
What is an insulator and a conductor? (Definition, and example.)
Insulator – a material that does not allow electric current to flow through it
Eg. Plastic, glass, rubber
Conductor – a material that does allow electric currents to flow through it
Eg. Copper, Aluminum, Iron
*Paper required for this. Definition of each circuit diagrams
Cell-
Resistor-
Conductor/Wire
Bulb-
Switch-
Fuse-
Ohmeter-
Voltmeter-
Ammeter
Cell- Source of current
Resistor- Creates resistance in flow of current
Conductor/Wire- Allows to current flow through it
Bulb- Converts electrical energy into light energy
Switch- Can stop and allow flow of current (opened stops, closed allows)
Fuse- breaks circuit when too much energy is flowing through it
Ohmeter- measures the resistance in a circuit (in series)
Voltmeter- measures of voltage in a circuit (in parallel)
Ammeter- measures current flowing in a circuit (in series)
Explain why a balloon is able to stick to a wall after you rubbed it on your head
Due to the friction between the balloon and the hair, the balloon would be charged in the wall would be neutral, therefore when contact is made between the wall and the balloon, it would attract due to neutral attracting charged
What are renewable energies and 2 examples
Natural sources that emit zero to little greenhouse gases
SolarHydro
Wind
What are the three methods of charging an object?
1. Induction – putting a charged object near a neutral object inducing a charge on the neutral object which is hooked up to a grounding wire.
2. Contact- touching a charged object to a non-charged object.
3. Friction – rubbing two uncharged objects together.
What are series and parallel circuits?
Series – a circuit with one path that allows electrons to flow
Parallel – a circuit with multiple paths that allow electrons to flow
For current potential difference and resistance, what are the symbols, definition, and units?
Current: symbol is I, definition is the flow of electrons, units are A
Voltage: symbol as V, definition is the pushing force of electrons through a circuit, units are V
resistance: symbol as R, definition is the opposing force of the flow of electrons, units is omega symbol
What are non-renewable energy sources? 2 examples
Sources of limited supply that are bad for the environment due to greenhouse gas emissions
Fossil fuels
Nuclear
What does the term grounding mean?
The process of which an object is connected to the Earth surface, therefore any excess energy will be safely, transported into said large neutral object, which in this case is the Earth.
What is the difference between the current travelling through a parallel circuit and a series circuit, and the difference between the potential difference across a parallel circuit and a series circuit?
Series circuit- current is directly equal to the source, voltage throughout the circuit is broken up and equal to the source when added together
Parallel Circuit- voltage throughout all paths are equal to the source and current is broken up throughout the paths, but equal to the source when added together
What is the equation for voltage, current, resistance?
V divided by I equals R
R times I equals V
V divided by R equals I
Economic & Environmental pros and cons of hydroelectric dams
Environmental pros: Produces low amounts of greenhouse house gasses, reliable/constant energy source, renewable source
Environmental cons: limit of access for agricultural services and resources, can negatively impact aquatic life, can be unreliable during natural disasters
Economic cons:high initial cost of installation, displacement of communities,
Economic pros: job opportunities, stable and predictable operating costs, ability for smaller communities to have flood control
Explain the concept of the electrostatic series and use an example
The electrostatic series is used to show which materials or objects have a stronger hold on electrons so at the top of the electrostatic series would be objects most likely to become positive and at the bottom would be most likely to become negative
an example being would be glass rubbed with plastic so after rubbing the two neutral objects together, the energy from the friction charges them, and in this case plastic has a stronger hold on electrons, therefore taking the electrons from the glass, making glass positive and plastic negative.
What is the difference between what would happen if one bulb went out in a parallel circuit and if one bulb went out in a series circuit?
Series circuit- one bulb goes out, all go out
Parallel circuit- one bulb goes out, the rest stay on if in different paths
What is the equation that figures out efficiency percentage?
Energy output divided by energy input (energy input must always be bigger)
* define input or output, multiply efficiency by whatever input or output is given
In my opinion, hydroelectricity good for southern Ontario
I believe hydroelectricity is less practical due to high costs, limited suitable locations and environmental impact like ecosystem disruption, harm to aquatic life, and possible community displacement