P4 electric circuits Flashcards
1
Q
electrons transferred when objects become charged
A
gain electrons- negative charged
lose electrons- pos charge
2
Q
charge flow
A
current x time taken
3
Q
potential diff across component
A
energy transferred / charge
4
Q
resistance
A
potential diff / current
5
Q
ohms law
A
current through a resistor at constant temp is directly proportional to PD across resistor
6
Q
components in series
A
current is same in each component
total PD is shared between components
adding each components resistance gives the total resistance
7
Q
components in parallel
A
total current is the sum of the currents through the separate components
PD across each component is the same
8
Q
more resistors in parallel
A
decreases total resistance- total current through resistors increased - PD unchanged
