Circuit Diagrams (OCR GCSE Physics A, Combined (Gateway Science Suite)): Flashcards

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Circuit Diagrams
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What does 1 volt P.D. mean?

1 joule per coulomb of charge

How voltmeters are connected

In parallel

P.D. in series circuits

Shared across components

P.D. in parallel circuits

Same across each component

Definition of battery

Two or more cells connected together

Unit of electrical charge

Coulombs (C)

1 ampere equals

1 coulomb of charge per second

Formula for charge flow

Q=I×tQ = I \times t

Formula for energy transfer

E=Q×VE = Q \times V

What does resistance indicate?

P.D. needed to drive current through a component

Formula for resistance

R=VIR = \frac{V}{I}

Electron flow direction

Negative to positive terminal

Current in series circuits

Same throughout

Device to measure current

Ammeter

Current in parallel branches

Splits, then adds to total

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