How can the current from a dynamo can be increased? Give three ways.

What can the output from a dynamo be displayed on?

What does an oscilloscope trace show?

What is the time for one complete cycle called?

What is the height of the wave on a oscilloscope trace?

What the length of the wave on a oscilloscope represent?

What is the equation for frequency using period?

What is frequency measured in?

What is period measured in?

What does a simple generator consist of?

How is a current produced by a simple generator?

How else can a current be produced?

How do generators at power stations work?

How does a turbine drive a generator in a conventional power station?

How is efficiency a measure of?

How is energy in a power station lost?

What is the equation for efficiency?

PRACTICE QUESTION
What is the efficiency of a power station if 60MJ of fuel energy is converted into 20MJ of electrical energy?