D.C Circuits Flashcards
Describe voltage, resistance and current in a series circuit.
Voltage=V1+V2, Resistance=R1+R2 and Current is the same throughout.
Describe voltage, resistance and current in a parallel circuit.
Voltage is the same on each branch, 1/Resistance= 1/R1+1/R2 and Current= I1+I2.
How does adding more components to a circuit affect resistance?
It decreases resistance.
What is a potential divider?
A circuit in which two or more components are connected in series to a supply. The output voltage from the circuit is taken across one of the components.
How does an LDR work?
It loses resistance when light intensity increases.
How does a thermistor work?
Its resistance decreases as temperature increases.
What is the electro motive force (emf) and its unit of measurement?
The energy transferred from chemical energy into other forms per coulomb of charge flowing through the source (W/Q) measured in volts.
What is series circuit?
One in which all the components are joined by a single conductor.
What is a parallel circuit?
One in which both ends of the circuit are joined by single components only.
