AC vs DC Electricity | GCSE Physics Practice
Electricity can flow in a single direction (DC) or constantly switch directions (AC).
What is the frequency of the UK mains supply?
What is AC vs DC Electricity | Practice?
"Alternating Current (AC) reverses direction periodically; Direct Current (DC) flows in one direction only."
What is the unit of electrical resistance?
Misconception: When a circuit is closed, the 'spent' current returns to the battery.
Calculate the charge flow if a 3A current flows for 10 seconds.
Current is the rate of flow of ____.
Current Types
Direct Current (DC): One direction only (found in batteries/cells).
Alternating Current (AC): Changes direction periodically (mains supply).
UK Mains frequency is 50 Hz (changes 50 times per second).
UK Mains potential difference is 230 V.
Oscilloscope Skill: On a trace, DC is a straight horizontal line; AC is a sine wave (up and down).
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