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ECE 2205 > Week 2 > Flashcards

Week 2 Flashcards

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1
Q

Define resistor

A

A linear, two-terminal circuit element that passively dissipates power as heat

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2
Q

Define Ohm’s Law

A

States that the voltage difference across a resistor is proportional to the current flowing through the resistor. The constant of proportionality is the resistance

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3
Q

What is the equation for Ohm’s Law?

A

V = IR

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4
Q

Ohm’s Law only relates the voltage difference and current flow across ______ resistor

A

One

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5
Q

Resistance simply relates the _________ necessary to drive a specific _________

A

Voltage, current

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6
Q

What is the equation for power that includes resistance?

A

P = RI^2

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7
Q

Because resistors dissipate power as heat, they should always ___________ power from a circuit

A

Remove

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8
Q

What is the reciprocal of resistance?

A

Conductance

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9
Q

What is the symbol for conductance?

A

G

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10
Q

What is the unit for conductance?

A

Siemens (S) lmao

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11
Q

True or False: If you have multiple voltage sources and the power through one of them is positive, the voltage source is being recharged

A

True

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12
Q

What will happen if you put two current sources in a single-loop circuit?

A

One of them will break (violates KCL)

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13
Q

Define a voltage divider

A

Just two resistors in a single-loop circuit. Very useful when in larger circuits

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14
Q

True or False: In a voltage divider, the total voltage from the source is divided between each resistor in direct proportion to each resistance

A

True

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15
Q

Define a single node-pair circuit

A

A circuit with two loops

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16
Q

Define a current divider

A

Two resistors, each in a separate loop with the source (most easily demonstrated with a current source)

17
Q

Define ‘in series’

A

When two (or more) circuit elements are connected such that the same current flows through them

18
Q

Define ‘in parallel’

A

When two (or more) circuit elements are connected such that the same voltage is across them

19
Q

Two (or more) voltage sources in series is equivalent to ____________

A

A single voltage source providing the algebraic sum of voltages

20
Q

Two (or more) voltage sources in parallel __________________

A

Should be avoided unless all voltages are equal

21
Q

Two (or more) current sources in parallel is equivalent to _________________

A

A single current source providing the algebraic sum of currents

22
Q

Two (or more) current sources in series __________________

A

Should be avoided unless all currents are equal

23
Q

Two (or more) resistors in series is equivalent to ___________________

A

A single resistor providing the sum of all resistances

24
Q

Two (or more) resistors in parallel is equivalent to ___________________

A

A single resistor providing the reciprocal of the sum of all reciprocal resistances

25
Q

The total resistance of resistors in _________ is always less than the resistance of any single resistance in this configuration

A

Parallel

26
Q

True or False: We can freely expand or contract nodes in a circuit regardless of how ideal a wire in the circuit is

A

False

27
Q

We can expand a single node of elements into two nodes of elements connected by a ______________

A

Short circuit

28
Q

Define Y⇌∆ Transformation

A

A way to better analyze a circuit in which the resistors are neither in parallel or series. It converts a triangular-shaped circuit into a Y-shaped circuit (pronounced wye-delta transformation)

29
Q

The most practical use of dependent sources is in part of a simplified model for a _______________________

A

Complex circuit element

30
Q

If the control element is part of the circuit with the dependent source, then __________________________ must be solved

A

A system of equations

ECE 2205 (2 decks)

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