Ammeters have to be connected in series in a circuit (per unit of charge)
The greater the current the faster the bulb.
Voltage is the amount of energy transformed in a circuit (per unit of charge)
Voltage is measured with a voltmeter, which is conneted in parallel across part of a circuit eg a bulb.
Voltage is also referred to as Potential difference (P.d.)
Resistance of a componant is a measure of its opposition to current flow.
Resistance is measured in ohms (Ω)
A circuit with a high resistance will have a low current.
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