Dynamics Flashcards
Measured in coulombs
Charge
1e- is equals to
1.602×10-¹⁹C
Time rate of change of charge
Measured in amperes
Current
Direction of direct current
Unidirectional
Alternating current direction
Periodically
Potential difference
Voltage
Energy required to move a unit charge through an element
Voltage
Rate per unit time at which ele tricak energy is transfered by an electrical circuit
Power
Form of energt restulting from the flow if the electric charge
Energy
Unit of energy
Joules or watt-second
Current is directly proportional to voltage applied, and inversely proportional to the resistance
Ohm’s law
Ability to resist the flow of an electric current
Resistance
Zero voltage, zero resistance
Short
Zero current, infinite resistance
Open
Current flows in a circuit when a switch is ____
Closed
Advantage of a 6 band resistor
Temperature coefficient
A single element in a circuit
Branch
Voltage source or resistor
Node
Point of connection between two or more branches
Node
Any closed path in a circuit
Loop
Resistance in series
All additions
R, I, P, R
Voltage division formula
Vx = VT Rx/Rt
Current division formula
Ix = IT ×Rt/Rx
Voltage in a parallel circuit are always ____
Equal
Total of current and power in a parallel circuit are ____
Addition
R total in a parallel circuit are ___
Parallel
Delta-wye transformation
Numerator= nasa labas (×)/
Denominator = loob (+)
Maximum voltage drop using ___ resistor in series
Highest
Least voltage drop using ___ in parallel
Highest
When one of three series resistors is removed from a circuit and the circuit is reconnected, the current ____
Increases
Three lights are connected in parallel across a 120 volt source. If one light burns out, _____
The remaining two will glow with the same brightness as before
Algebraic sum of all voltages around a closed path (or loop) is zero
Kirchoff’s voltage law
Algebraic sum of currents entering a node (or a closed boundary) is zero.
Kirchoff’s current law
A process of replacing a voltage source in series with a resistor by a current source in parallel with a resistor, vice versa
Source transformation
Theorem states that we can replace all the electric circuit, except a load resistor, as an independent voltage source in series, and the load resistor response will be the same
Thevenin’s theorem
Theorem states that we can replace the electric circuit except the load resistor as a current source in parallel.
Norton’s theorem
Two terminal passive device that stores energy as electric field
Capacitors
Composed of a dielectric sandwiched between two conducting sheets in parallel
Capacitors
Series capacitance for charge is ____
Equal
Voltage capacitances in series are ___
Addition
Series capacitance formula
Parallel
Parallel capacitance for charge is ____
Addition
Voltage in parallel capacitance are ____
Equal
Parallel capacitance formula
Addition
Also called a coil, choke, or reactor
A passive two-termjnal electrical component that stores energy un a m field when e current flows through it
Inductors
Typically consists of an insulated wire wound into a coil around a core
Inductors
Series inductance formula
Addition
Parallel inductance formula
Parallel
Number of nodes in a parallel circuit
2 nodes
Number of nodes in a series
1 node
Time required for the response to decay to a factor of 1e or 36.8 percent of its initial value
Time constant
