Electricity Flashcards
What is the equation for calculating the number of electrons in a circuit/component?
Number of electrons = Total Charge (Q) / Charge on electron
What is the formula linking charge current and time?
I = change in Q / change in T
What part of the circuit do electrons come from?
They come from the wire
How do you calculate total resistance in series circuits?
Rt = R1 + R2 + R3
How do you calculate total resistance in parallel circuits?
Rt = R1-1 + R2-1 + R3-1
In series, the potential difference in the components are ____
Divided
In series the current is ____
Equal
In parallel the potential difference is ____
Equal
In parallel the current is ____
Divided
What is the conservation of energy?
In a closed loop, the sum of potential difference is equal to the potential difference supplied
What is the conservation of charge?
The sum of currents entering and leaving a junction is 0
What is true about the potential difference across each resistor in parallel?
The potential difference is always the same
In a parallel circuit, the sum of currents in the main current is equal to….
The sum of the currents in the separate branches
How do you know if a component is an ohmic conductor?
If it obeys Ohm’s law
