05 November 2014. 6.5 Electrical Energy and Charge. How many meanings of the word charge can you think of?. 05 November 2014. 6.5 Electrical Energy and Charge. Page 192 AQA Physics. What is electric current? What is the unit of electric charge?
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How many meanings of the word charge can you think of?
Page 192 AQA Physics
In metals current is a flow of electrons. In all materials current is a flow of charged particles.
(Coulombs) (Amperes) (seconds)
E.g. A flow of 2A for 5s is a charge of 10 Coulombs.
Page 192 Q a)
The capacity store of a battery is shown as Amp-hours or milliamp-hours (mAh). This tells you how long a battery can deliver a certain current.
Energy transformed = potential difference x charge flow
From page 193 copy the worked example and answer b).