Circuit Analysis

ELEC 1000: Lecture 2

Diamond Box in a circuit

Dependent source

Current Sources in Series

Can’t be summed

Current sources in parallel

Are summed

How many terminals

Current/Voltage source - 2, Dependent sources - 4 (2 sensing)

A resistor with a voltage source in parallel can be converted to a current source in series with a resistor

false

A resistor with a voltage source in series can be converted to a current source in parallel with a resistor

which the current is equivalent to the voltage divided by the resistor

A current source in 1 mesh only

implies that the current in the mesh is equal to the current source

A current source in multiple meshes

implies an unknown voltage across the current source which will be needed to be calculated

Polarity of voltage is dependent on direction of current

false

Nodal analysis is based on

current inputs and outputs

Mesh analysis is based on

Voltage summing to 0 in a mesh to meet KVL

Thevenein’s theory

Simplify any circuit to a voltage source and a resistor to calculate variable resistors

Thevenin’s: How to calculate resistance

By replacing voltage sources with short circuits and current sources with openings and calculating the remaining circuits resistance

Thevenin’s: How to calculate voltage

Replacing the variable resistor with a circuit break and calculating the voltage across it

Maximum Power Transfer Theorem

A load will recieve maximum power from a network when its resistance is equal to the thevenins resistance (RL = RTH)

Superposition theorem

A linear circuit can be calculated by checking the scenario where all the voltmeters are made wires and the scenario where all the current sources are made gaps, while dependent sources are untouched, simultaniously calculating currents