Electricity

Question 1

Static Electricity

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

Answer 1

They repel from each other

Question 2

Static electricity

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

Answer 2

They attract because opposites attract

Question 3

Each proton cares what type of charge?

Answer 3

Positive charge

Question 4

Each electron carries what type of charge?

Answer 4

Negative charge

Question 5

Negatively charged bodies have what?

Answer 5

More electrons that protons

Question 6

Positive charged bodies have what?

Answer 6

Less electrons that protons

Question 7

Static electricity

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

Answer 7

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

Question 8

What are the three methods of charging?

Answer 8

1. Friction
2. Conduction
3. Induction

Question 9

Static electricity

What charges are the object before friction?

Answer 9

They do not have a charge they are neutral

Question 10

Static electricity

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

Answer 10

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

Question 11

Static electricity

What are the charges of the object before conduction?

Answer 11

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

Question 12

Static electricity

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

Answer 12

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

Question 13

Static electricity

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

Answer 13

One charged object and one neutral object.

Question 14

Static electricity

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

Answer 14

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

Question 15

Which way does the conventional current direction flow?

Answer 15

From the negative terminal to the positive terminal

Question 16

What is a direct current?

Answer 16

Electrons move in the same directions

Question 17

What is an alternating current?

Answer 17

The electrons move back and forth.

Question 18

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

Answer 18

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)

Question 19

Electrical function

What is a power supply? Name three.

Answer 19

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)

Question 20

Power supply

What are the advantages and disadvantages of a battery?

Answer 20

Adv

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

Dsdv

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

Question 21

Power supply

What are some advantages and disadvantages of photovoltaic cells?

Answer 21

Adv

• good for environment
• portable

Dsdv

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

Question 22

Electrical function

What is conduction?

Answer 22

Allows electrons to flow through them (ex.wires)

Question 23

Electrical function

What is an insulation?

Answer 23

Stops electrons from flowing through the circuit

Question 24

Electrical function

What’s a protection? Name two examples.

Answer 24

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

Examples

1. Fuse
2. Breaker

Question 25

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

Answer 25

Fuse
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.

Question 26

Electrical function

What’s is resistance?

Answer 26

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)

(RESISTOR)

Question 27

Electrical function

What is a control?

Answer 27

Can open and close a circuit.

open circuit = no electron flow

Closed circuit = allows electrons to flow

(SWITCH)

Question 28

Electrical function

What is transformation of energy?

Answer 28

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