2. (a) The table shows the conductivity of some metals.
metals
Conductivity at 20'C
5.9 x 10²
5.8 x 10²
4.5 x 107
3.5 x 107
6.3 x 10²
copper
Annealed copper
gold
Aluminium
silver
A student wants to know the comparison. How should he do? Give a reason. (2)
2. (b) Draw a suitable thing for comparison. (4)
2. (c) Give conclusion for your drawing thing. (1)