Four different types of light globes were tested for their efficiency. The results are in the table below. Globe numberHeat outputLight output
185%15%
290%10%
350%50%
430%70%

(a)Identify the energy source that was converted to produce light and heat from the globe?



(b)Define the term ‘efficiency’ in relation to this globe test.



(c)Which globe is the most energy efficient? Explain your answer using data from the table.





(d)Describe why is it desirable to have energy-efficient light globes?

One two three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and five of the one two three four five and four five and three four five