Circuit Analysis Quiz

A method for labeling current directions in circuits using two subscripts to mark the start and end points of the current flow.

Current flowing from node 'a' to node 'b'.

Current flowing from node 'b' to node 'a'.

iab and iba have the same magnitude but opposite signs.

The specified direction of current flow.

Component (such as resistor, capacitor, source) in a circuit.

The absolute value of the current.

The direction used to determine the sign of the current.

Current is the same for all cross-sections of a circuit element.

The direction of current flow might be unknown at first; so, we assign variables like i1, i2, i3 based on the assumed direction.

The charge (q) present over a period of time (t) in a circuit element, graphically represented.

The current (i) over a period of time (t) represented graphically in a circuit element, the rate of change of charge.

The current (i) is determined by finding the derivative of the charge (q) over time (t).

The charge (q) is zero before time t equals zero in seconds.

The current (i) is zero before time t equals zero in seconds.

Current is measured in Amperes (A) and charge in Coulombs (C).

The rate of energy transfer, calculated as the product of current (i) and voltage (v).

The rate at which energy is being transferred through a circuit element.

The current reference entering the positive polarity of the voltage.

Indicates that the circuit element is absorbing energy.

Indicates that the circuit element is supplying energy to the circuit.

The measurable physical quantity that characterizes the amount of energy stored in a system.

The difference in electric potential between two points in a circuit, measured in volts.

The rate of flow of electric charge, measured in amperes.

A broken path in a circuit that prevents current flow. It is like a blocked road with no way to travel through.

A component that provides a constant or varying voltage across its terminals, regardless of the current flowing through it.

A type of voltage source that provides a constant voltage over time, like a battery.

A type of voltage source that varies with time, typically in a sinusoidal pattern.

Simplified representations of real-world components, used for analysis and understanding.

A voltage source whose output voltage is independent of other components in the circuit.

The direction of voltage across a device, indicated by plus and minus signs.

Symbols used to indicate the reference direction of voltage across a component.

A voltage source whose output voltage is proportional to an input voltage elsewhere in the circuit.

A voltage source whose output voltage is proportional to a current flowing through another circuit element.

The output voltage of a VCVS is determined by a constant multiplied by the voltage across a specific pair of terminals in the circuit.

The output voltage of a CCVS is determined by a constant multiplied by the current flowing through a specific element in the circuit.

Dependent voltage sources are represented by a diamond-shaped symbol with the reference polarity indicated by marks inside the diamond.

The marks inside the diamond symbol of a dependent source indicate the positive and negative terminals.

Dependent sources are used to model the behavior of active devices, such as transistors, and to represent relationships between different parts of a circuit.

The algebraic sum of currents entering a node in an electrical circuit is equal to zero.

A point in an electrical circuit where two or more circuit elements are connected.

The algebraic sum of currents entering a node, considering currents entering as positive and currents leaving as negative.

KCL helps us analyze and solve complex circuits by providing a fundamental relationship between currents at a node.

1. Identify nodes in the circuit. 2. Assign current directions for each element connected to the node. 3. Write the KCL equation for each node, summing the currents entering and subtracting the currents leaving.

If only two elements are connected at a node, their currents must be equal in magnitude but opposite in direction.