Physics electricity Flashcards
Charge(C)=
Current(A) x time(secs)
In a series circuit, what is the current like
The same everywhere in the circuit
In a series circuit, what is the voltage like
It is shared between the components in the curcuit
In a parallel circuit what is the current like
It is the same as the current going back to the cell but is shared between the branches of the circuit
In a parallel circuit what is the voltage like
It is the same as the voltage from the cell
What is conventional current
Current flowing from positive to negative
What is electron flow
Current flowing negative to positive
What can you say about a current flowing through a wire
It is directionally proportional to the potential difference (voltage) across it provided the temp remains constant
What happened when a wire length is uncreased
The resistance increases
What happens when a wire thickness increases
The resistance decreases (halves)
Resistance =
gradient
To get resistance in a series circuit you
Add up the total of all the resistors.
The get resistance in a parallel you
Put Rt and an arrow to say it’s smaller than the smallest resistor
Voltage (V) =
Current(A) x Resistance (-^-)
Power =
Voltage x current
Current 2 x resistance
