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DC Circuits - Coggle Diagram
DC Circuits
parallel circuit
parallel circuit has more than one pathway for current to flow
Quantity: Rule
current : Total current = sum of branch currents
I
total
=I
1
+I
2
+
EMF:pd: EMF=pd across each branch V total = V1=V2
resistance: 1/Rtotal=1/R1+1/R2.... soRtotal=(1/r1+1/r2+...)-1
adding more resistor in parallel decreases total resistance
quantity : rule
Current
Same at every point
I
total
=I
1
=I
2
EMF/pd
MF = sum of individual pd values
V
total
=V
1
+V
2
+
resistance
Total resistance= sum of individuals resistances
R
total
=R
1
+R
2
potential divider: use the voltage drop across resistor series to divide the supplt voltage
Vout= R2/R1+R2xVsupply
The larger the resistance of a component, the larger its share of the supply voltage.
Used extensively in sensing circuits with transducers.
transcuder and thermistors and LDRS
converts changes physical conditions ionot electrical signals
thermistor
resistance varies with temperature
a series has only one pathway for current to flow
adding more resistors in series increases total resistance