electricity

Electric charge

A property of matter that can be positive or negative

Is a proton positive negative or neutral? (PEN)

Positive

Is an electron positive negative or neutral? (PEN)

Negative

Is a neutron positive negative or neutral? (PEN)

Neutral

Static electricity

A buildup of electric charge that doesn’t move

Friction

Rubbing objects together that transfers electrons

Discharge

Excess electrons suddenly move, creating a spark

Electron affinity

How strongly a material holds onto electrons

What are conductors?

Allows electrons to flow through (copper and gold)

What are insulators?

Doesn’t allow electrons to pass through (rubber, plastic, wood)

Electrical circuit

A complete path that allows ELECTRONS to flow

Closed circuit

Complete path and ELECTRICITY flows

Open circuit

Broken path and ELECTRICITY doesn’t flow

Series circuit

One pathway for electroma

Parallel circuit

2 or more pathways for electrons to flow

What is the power source?

Battery or cell

What is the conducting path?

Wires

What is the load?

Devices that use energy (bulb and motor)

What is the control?

Switch

What is the current(I) ?

The flow of electric charge. It’s measured in amperes (A)

What is the voltage (V)?

Energy that pushes electrons. It’s measured in volts (V)

What is resistance (R)?

Opposition to currents flow. It’s measured in ohms (Ω)

How do you find the current? (I) [ / means division]

I = V / R

How do you find the voltage (V)?

V = I x R

How do you find the resistance (R)? [/ means division]

R = V / I

What is electric energy measured in?

kWh

How do you find the electric efficiency? [/ means division]

Efficiency(%) = output / input x 100

How do you find the cost?

Cost= electrical energy(kWh) x rate

How do you calculate energy?

electrical energy(kWh) = power(kW) x time(h)

How do you convert W to kW?

W / 1000 = kW

How do you convert minutes to hours?

Minutes / 60 = hour

What is the symbol for cost?

$

What is the symbol for energy?

kWh

What if they symbol for efficiency?

%

What is the symbol for output or input?

W

What is the symbol for rate?

$

What is the symbol for power?

kW

What is fuse?

Melts when current is too high, breaking the circuit

What is a primary cell?

A non rechargeable battery

What is a secondary cell?

A rechargeable battery

What are electrodes?

Two metal strips in a cell

What is an electrolyte?

Two metal strips in a cell

What are + and - terminals?

Ends of a battery where current enters or leaves

What is this

Battery

What is this

Switch

What is this

Lamp

What is this

Motor

What is this

Fuse

What is this

Resistor