3.2 Flashcards
How does current vary in a series circuit?
It doesn’t, current is equal at all points in a series circuit
How does voltage vary across the components in a series circuit?
Voltage is divided between the components in a series circuit.
How do you calculate total resistance in a series circuit?
Simply add the resistance of each component to calculate total resistance.
How do you calculate current in a parallel circuit?
Current is divided between the branches of a parallel circuit
How do you calculate voltage in a parallel circuit?
Voltage is equal across each branch of a parallel circuit
How do you calculate total resistance in a parallel circuit?
1/Rt = 1/R1 + 1/R2 …
What is a voltage divider?
a simple circuit where two resistors are connected in series, which divide a supply voltage
What is a thermistor?
A resistor that’s resistance changes with temperature
What 3 equations can be used to calculate unknown values of resistance and voltage in a voltage divider?
V1/V2 = R1/R2
Vs = V1 + V2
V1 = Vs x (R1/R1+R2)
Break down the following equation into its elements and units
P = IV
P = power (W)
I = current (A)
V = voltage (V)
Break down the following equation into its elements and units
P = I^2R
P = power (W)
I = current (A)
R = resistance (ohms)
Break down the following equation into its elements and units
P = V^2/R
P = power (W)
V = voltage (V)
R = resistance (ohms)
