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Flashcards in Electricity Deck (28):

Static Electricity

If two like charges are brought together, what is the result?

They repel from each other


Static electricity

If charges of opposite signs are brought together, what is the result?

They attract because opposites attract


Each proton cares what type of charge?

Positive charge


Each electron carries what type of charge?

Negative charge


Negatively charged bodies have what?

More electrons that protons


Positive charged bodies have what?

Less electrons that protons


Static electricity

When two object of opposite charge come close together or touch, what is the result?

An electrostatic shock (sometimes accompanied by a spark, which shows hat energy has passed through the air and heated it, making it light up)


What are the three methods of charging?

1. Friction
2. Conduction
3. Induction


Static electricity

What charges are the object before friction?

They do not have a charge they are neutral


Static electricity

During friction, when rubbing two objects together what occurs between those two object?

Rubbing causes charges (electrons) to transfer from one object to another, resulting in two objects of opposite charges.


Static electricity

What are the charges of the object before conduction?

You have one charged object (- or +) and one neutral object


Static electricity

During conduction, what are the charges of the two objects after they have been in contact with one another?

The two objects have the same charges (- & - or + & +)


Static electricity

Before induction partakes, what are the charges of the objects?

One charged object and one neutral object.


Static electricity

During induction, when the charged object is brought close the neutral object, what is the outcome?

When the charged object is brought close to the neutral object, the charges separate. The charged object keeps its charge, however the neutral object becomes half negative and half positive


Which way does the conventional current direction flow?

From the negative terminal to the positive terminal


What is a direct current?

Electrons move in the same directions


What is an alternating current?

The electrons move back and forth.


What’s the difference between an electrical component and electronic component?

Electrical current
- conductor (metal ex copper)
- normal size circuit
- power of circuit: normal intensity

Electronic component(printed circuit)
- semi conductor (silicon)
- miniaturized circuit
- power of circuit: low intensity (because too many electrons flowing through can fry the system)


Electrical function
What is a power supply? Name three.

A power supply is a component that provides the energy to make current flow through the wires and components of the circuit.

Three examples
1. Battery
2. Electrical outlet
3. Photovoltaic cell (solar panel)


Power supply

What are the advantages and disadvantages of a battery?

- portable
- can be recharged
- still works in case of power outage

- not environmentally friendly (contains acid)
- has a life span (won’t last forever)


Power supply
What are some advantages and disadvantages of photovoltaic cells?

- good for environment
- portable

- expensive
- not very reliable( no sun = no power)


Electrical function

What is conduction?

Allows electrons to flow through them (ex.wires)


Electrical function
What is an insulation?

Stops electrons from flowing through the circuit


Electrical function
What’s a protection? Name two examples.

Can automatically cut current flow in the event of a power surge.

1. Fuse
2. Breaker


What’s the difference between a fuse and breaker? Which one is better?

A fuse contains a metal filament, when current intensity is too high, the filament melts, breaks and therefore prevents and electric current from flowing though the circuit... A fuse must be replaced when filament breaks

Breaker(*is better*)
A breaker contains a switch with a bimetallic strip inside. When current intensity is too high, the bimetallic strip gets hot and bends = preventing an electric current from flowing through the circuit... You must flick the switch to restore flow of electric current.


Electrical function

What’s is resistance?

Can limit the flow of electrons through the circuit.

A high resistance = low current intensity( less electrons flowing through)

Low resistance = high current intensity ( more electrons flowing through)



Electrical function

What is a control?

Can open and close a circuit.

open circuit = no electron flow

Closed circuit = allows electrons to flow



Electrical function

What is transformation of energy?

This represents the function performed by any component that can transform electrical energy into another form of energy