Topic P2 - Electricty Flashcards by Isla MacLeod | Brainscape

Q

What’s current?
Units?

A

Flow of electric charge
Amperes amps A

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Q

What’s potential difference?

A

Driving force that pushes charge round
Volts V

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Q

What’s resistance?

A

Anything that slows down charge flow
Ohms

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Q

Equation for charge flow?

A

Charge flow = current x time
Q=IT

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Q

Potential difference equation

A

Potential difference = current x resistance

V=IR

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Q

Describe current is series circuits

A

Same everywhere

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Q

Describe potential difference in series

A

Shared between components

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Q

Describe resistance in series

A

Adding a resistor increases total resistance

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Q

Current in parallel circuits

A

Sum of the currents through each branch

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Q

Potential difference in parallel

A

Same across all sourves

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Q

What happened when you add a resistor in parallel

A

Decreases total resistance of the cirucit

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Q

Use of live wire?

A

Provides alternating potential difference from mains supply

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Q

Use of neutral wire

A

Completes cirucit

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Q

Use of Earth wire

A

Stops appliance casing becoming live

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