Electricity Flashcards by Eden Johnson | Brainscape

Q

Current?

A

Symbol captial i, measured in amps

Flow of electrons

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Q

Voltage?

A

Symbol V, measured in volts

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Q

Energy?

A

Symbol E, measured in joules

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Q

Power?

A

Symbol P, measured in watts

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Q

Resistance?

A

Weird circle bridge thing, measured in ohms

Slows current

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Q

Electricity definition?

A

Flow of electrons

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Q

Voltage/ potential difference definition?

A

The push given to the electrons

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Q

Vaultmeter?

A

In parallel

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Q

Ammeter?

A

In series

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Q

Charge?

A

Value of electricity flowing in a circuit(coloumbs)

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Q

Energy equation

A

Energy= charge(coloumbs) X pd (volts)

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Q

Charge equation

A

Charge(coloumbs) = current X time(s)

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Q

Current in series?

A

Same

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Q

Current in parallel?

A

Split among branches

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Q

Potential difference in series?

A

Split

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Q

Potential difference in parallel?

A

Same

Q

Differences resistance in series and parallel?

A

Series, add together

Parallel, 1/resistance + 1/resistance

Q

Potential difference equation

A

Pd(v)=current(a) X resistance (ohms)

Q

LDR(light dependent resistors) use?

A

Street lights, security lights

Q

Energy equation?

A

Energy= current X pd(volts) X time

Q

Power equation (energy and seconds

A

Power = energy transferred/ time(s)

Q

Power equation (pd current)

A

Power equation = pd(volts) X current

Q

Power equation (current resistance)

A

Power= current squared X resistance(ohms)

Q

Fuse?

A

Safety, wire ,let’s of the flow of electrons is too high