Electricity Flashcards

1
Q

charge measured in

A

coulombs

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2
Q

current measured in

A

amps

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3
Q

resistance measured in

A

ohms

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4
Q

voltage / potential difference measured in

A

volts

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5
Q

equation that links charge, current, and time

A

Q = I x T

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6
Q

equation that links potential difference, current, and resistance

A

V = I x R

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7
Q

electron insulator

A

a material that stops electrons from moving as easily

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8
Q

electron conductor

A

a material that helps electrons move more easily

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9
Q

series circuit

A

a circuit that is essentially a circle

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10
Q

parallel circuit

A

a circuit with multiple branches

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11
Q

resistance

A

a property of a component, making it difficult for charge to pass through

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12
Q

electrons

A

they are tiny negatively charged particles that are part of atoms

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13
Q

voltage

A

an electrical push from a battery / cell

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14
Q

current

A

the movement of electrons in a circuit

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15
Q

electric current

A

Rate of flow of electrical charge

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16
Q

diode

A

component that only allows current to flow in forward direction

17
Q

parallel circuit - potential difference

A

components in parallel have the same potential difference across each component

18
Q

total current

A

sum of currents flowing through the circuit

19
Q

parallel circuits - resistance

A

total resistance is equal to 1/R1 + 1/R2 + 1/R3 etc
always less than the smallest resistance in circuit
adding more resistors decreases the total resistance

20
Q

series circuit - resistance

A

total resistance is the sum of residtances of each component

21
Q

energy transferred =

A

power x time

22
Q

energy transferred =

A

charge x potential difference

23
Q

power =

A

work done / time