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Physics > DC Circuits > Flashcards

DC Circuits Flashcards

1
Q

Source

A

A device that converts other kinds of energy into electrical energy

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2
Q

Resistance

A

The opposition to the flow of electric current in a conductor

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3
Q

Voltage

A

Electrical potential difference

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4
Q

EMF

A

The voltage a source provides to a circuit

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5
Q

Current

A

The flow of electrons through a conductor

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6
Q

Electric power

A

The rate at which a resistor converts EPE into another kind of energy

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7
Q

Electric energy

A

The amount of energy converted by a resistor in a certain amount of time

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8
Q

Series combination

A

A group of resistors where the current must flow through all resistors

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9
Q

Parallel combination

A

A group of resistors that are connected to common points or junctions

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10
Q

Equivalent resistors

A

The combined resistance of a combination of resistors

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11
Q

Junction

A

A point in a circuit where two wires connect and produce two possible paths for the current

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12
Q

Circuit loop

A

Any closed path in a circuit that had no junctions

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13
Q

DC

A

Current that only flows on the same direction

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14
Q

AC

A

Current that changes directions periodically

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15
Q

Elastic charge

A

Total charge of all electrons that pass through a conductor in a certain amount of time

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16
Q

Ohms law

A

Current through a resistor is directly proportional to the voltage across the resistor and inversely proportional to the resistance of the resistor

17
Q

Amp

A

Unit of electric current

18
Q

Ohm

A

Unit of electrical resistance

19
Q

Watt

A

Unit of electrical power

20
Q

Joule

A

Unit of electrical energy

21
Q

Kilowatt-hour

A

kWh unit of commercial electrical energy

22
Q

Junction law

A

The total current i to any junction must equal the total current out of the junction

23
Q

Loop law

A

The sum of the voltage drops across the resistors must equal the voltage of the source

24
Q

Circuit

A

A combination of source and resistor(s) connected by conductors so there is at least one unbroken path from the source through the resistors and back to the source

Physics (4 decks)

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