ac and dc (AQA GCSE Physics Combined Science): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What are the tiny particles that flow through a wire to create electric current?
What are the tiny particles that flow through a wire to create electric current?
Electrons
What is needed for electric current to flow?
What is needed for electric current to flow?
A complete circuit
In direct current (dc), which direction do electrons flow?
In direct current (dc), which direction do electrons flow?
One direction only
Which of these is a source of dc?
Which of these is a source of dc?
Batteries
What does dc look like on an oscilloscope?
What does dc look like on an oscilloscope?
A straight horizontal line
How do electrons behave in alternating current (ac)?
How do electrons behave in alternating current (ac)?
Keep changing direction
What is the voltage of UK mains electricity?
What is the voltage of UK mains electricity?
What is the frequency of UK mains electricity?
What is the frequency of UK mains electricity?
How many direction changes occur per second in ac?
How many direction changes occur per second in ac?
100 changes
What does ac look like on an oscilloscope?
What does ac look like on an oscilloscope?
A wavy line (sine wave)
Which of these devices uses dc in the home?
Which of these devices uses dc in the home?
Mobile phones
What does the power rating of an appliance tell you?
What does the power rating of an appliance tell you?
Energy used each second