# Getting Started Flashcards

How do positive and negative charges interact?

Like charges repel and unlike charges attract

‘q’ stands for…

Charge

The formula for current is…

q/sec

Charge is defined as…

How many electrons move past in a second

Current is defined as…

The direction in which positive charges are moving, i

Who discovered the electron and when?

JJ Thompson, 1897

Who decided the direction of current flow and when?

Benjamin Franklin, 1747

What is power measured in?

Watts

Voltage measures…

The energy transferred per unit of charge

The formula for power is…

V x i

Engineering notation is done how many digits at a time?

3

10 to the 12th, 9th, 6th, and 3rd power

Tera, giga, mega, kilo

10 to the negative 3rd, 6th, 9th, and 12th power

Milli, Micro, nano, and pico

Frequency

Number of times something happens per second, measured in Hz

Ampere

Measures current