8.04 Current in a simple circuit Flashcards
What is an electric cell?
A battery
What is a flow of charge called?
An electric current
What is the SI unit of current?
Ampere (A)
What is a circuit?
The conducting path through the lamp, wires, switch, and battery is called a circuit. There must be a complete circuit for the electrons to flow.
What can be used to measure current?
Ammeter.
What is used for smaller currents?
A milliammeter
What unit does the milliammeter use?
The unit is the milliampere (mA). 1000mA = 1A
In a circuit, what remains constant?
The current is the same at all points of a simple circuit.
Which equations link charge and current?
charge (C) = current (A) * time (s)
What is conventional current direction?
The direction from + to - round the circuit. The conventional current direction is equivalent to the direction of transfer of positive charge.
Which way do electrons flow?
Being negatively charged, they are repelled by negative charge, so are pushed out of the negative terminal of the battery.
