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- QUESTION 1
- b) the electrons flow from W to Z, as electrons are negatively charged, they are attracted to the positive terminal of the power supply.
- c) number of free electrons per unit volume
- d) (re-arrange I = nAve)
- = 1.56x10^30
- e) ???
- QUESTION 2
- a) i. number of free electrons per unit volume
- a) ii. (see diagram middle of page 60)
- b) i. (re-arrange I = nAve)
- = 4.14ms^-1
- b) ii. due to the high drift velocity, the electrons are travelling at a higher speed. Therefore more energy is converted to heat when they collide with the fixed wire nuclei. Hence more energy is wasted.
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