Electric Current Flashcards
1
Q
what is the definition of electric current
A
the rate of flow of charge
2
Q
what is a simple way of describing the rate of flow of charge
A
the amount of charge per second that passes past a given point
3
Q
given the definition of current, what is the equation that is used to calculate it given the two variables mentioned in its definition
A
- the rate (seconds, s)
- of flow of charge (charge,Q)
- if it is measured in the sense of how much charge is passing through a point, you are dividing charge be seconds
- giving you I = Q / t
4
Q
what is current measured in
A
amperes (A)
5
Q
what are amperes
A
- the base unit of electric current
- defined in terms of the force between two parallel wires
- each carrying a current of 1A
6
Q
given the formula for current, what is the formula for charge
A
Q = It
7
Q
what is the charge of a single electron
A
1.6x10-19 C
