5.4 Circuit Fundamentals Flashcards
Ohm’s law
The amount of current is determined by the proportional relationship between voltage and resistance. The greater the voltage, the greater the current, and vice versa. The greater the resistance, the lower the current, and vice versa.
What is the mathematical expression of Ohm’s law?
I = E/R
What is the basic power formula/Watt’s law?
The rate at which a load consumes energy is determined by current and voltage.
What is the mathematical expression of Watt’s law?
P = E x I
What is the mathematical formula for work?
W = P (a certain amount of power) x t (applied for a certain period of time)
In a series circuit, the total resistance is equal to ________.
The sum of the individual resistances
In a series circuit, the current is ________.
The same throughout
The total voltage at the source of a series circuit is equal to _______.
The sum of the voltages at each of the resistor
What is the main disadvantage of series circuits?
A break anywhere in the circuit stops the electron flow in the entire circuit.
Branch
One of the pathways in a parallel circuit
What is the main advantage of parallel circuits?
A break in any branch of the circuit doesn’t stop the electron flow to the other branches
The voltages across all branches of a parallel circuit are equal to _______.
The voltage at the source
The total current in a parallel circuit is equal to ___________.
The sum of the currents flowing through each of the branches
The total resistance in a parallel circuit is ________________.
The reciprocal of the sum of the reciprocals of the separate resistances in parallel.
Complex circuit
Combines loads in parallel with loads in series in a single circuit
