Direct and Alternating Potential Difference

• what is an example of direct current?

  Current from a cell
• What is direct current?


  current which flows In one direction
• What type of current is in the mains of the UK?

  Alternating current
• What is alternating current ?

  current which is constantly changing direction
• what is a benefit of alternating current ?

  It is easy to use a transformer to increase or decrease the voltage
• What is the frequency of alternating current (UK)?

  50hz
• how many times does alternating current switch direction per second in the uk ?

  50 times known as the frequency
• What is the potential difference of alternating current in the uk?

  230 V
• what is an oscilloscope used for ?

  calculate frequency of direct or alternating current
• Graph for direct and alternating current- 


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• How can you change alternating current to direct current ?

  A diode