# Physics Topic Two: Controlling and Using Electrical Current

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• Created by: Fawnflys
• Created on: 19-04-15 17:52
What is current?
the rate of flow of charge around a circuit.
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What is the unit for current?
Ampere, A.
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What is voltage?
The driving force that pushes current around the circuit.
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What is another name for voltage?
Potential difference
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What is the unit for voltage?
Volt, V.
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What is resistance?
anything in a circuit which slows the flow down.
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What is the unit for resistance?
Ohm
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What happens if you increase the voltage?
more current will flow
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What happens if you increase the resistance?
Less current will flow.
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What happens when an electrical charge goes through a change in potential difference?
Energy is transferred.
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At the power source what happens to the charge?
Energy is supplied and raises the voltage.
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What happens to the voltage and charge at components in the circuit?
The charge gives up energy and the voltage lowers.
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The bigger the change in voltage means...
The more energy is transferred for a given amount of charge through the circuit.
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When a Battery has a Bigger voltage what happens to the energy supply in the circuit?
A bigger voltage will supply more energy to the circuit, as the charge is raised up higher at the start more energy is dissipated around the circuit too.
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## Other cards in this set

### Card 2

#### Front

What is the unit for current?

Ampere, A.

What is voltage?

### Card 4

#### Front

What is another name for voltage?

### Card 5

#### Front

What is the unit for voltage?