Podcast
Questions and Answers
What is the primary characteristic of alternating current (AC)?
What is the primary characteristic of alternating current (AC)?
Which of the following sources provides direct current (DC)?
Which of the following sources provides direct current (DC)?
At what frequency is the mains electrical supply in the UK generated?
At what frequency is the mains electrical supply in the UK generated?
What does the positive and negative values on a voltage-time graph indicate?
What does the positive and negative values on a voltage-time graph indicate?
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What is the voltage of the mains electrical supply found in UK homes?
What is the voltage of the mains electrical supply found in UK homes?
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Study Notes
Types of Electric Current
- Electric current flows as either direct current (DC) or alternating current (AC).
- DC flows in one direction only.
- AC regularly changes direction and size.
- Visually, DC is represented by a horizontal line on a voltage-time graph, AC by a fluctuating curve.
- Car batteries, dry cells, and solar cells supply DC.
- Power stations produce AC using magnets.
AC Characteristics
- The UK mains electrical supply is AC.
- Mains voltage is 230 Volts (V).
- The frequency of the UK mains supply is 50 Hertz (Hz).
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Description
Explore the fundamental concepts of electric current in this quiz, focusing on the differences between direct current (DC) and alternating current (AC). Understand their characteristics, graphical representations, and practical applications like car batteries and mains supplies. Test your knowledge on voltage and frequency in AC systems.
