Circuit Fundamentals Flashcards
(73 cards)
Ohm’s law
Current (I) is a proportion of voltage (E) and resistance (R)
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 resistance within the circuit
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 fault in the circuit stops the current in the entire circuit.
Branch
A pathway in a parallel circuit
What is the main advantage of parallel circuits?
A fault in any branch of the circuit doesn’t stop the current to other branches
The voltages across all branches of a parallel circuit are equal to _______.
The Source Voltage
The total current in a parallel circuit is equal to ___________.
Sum of the current flowing through each branch
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
How do we analyze complex circuits?
By reducing the parallel circuits into an equivalent series circuit
As Current (I) increase, resistance __________
Decreases
Describe the Ohm’s Triangle
Current (I)
The continuous flow of free + electrons through a conductor
Voltage (V)
The motivating force, PRESSURE, causing electrical current
Current (I) is measured in …
Amps
As current increases, voltage…
Increases
Electron current flows from
Negative to Positive
Electron current flows from???
Negative to Positive
