Question

Mohammed listed the steps that occur when a solar cell generates electricity.

1: Solar energy is absorbed by the cell.
2: Free electrons move to the front of the cell.
3: Electrons begin to move.
4: Electrons flow as electricity.

Which best explains how to correct Mohammed’s error?

Switch steps 2 and 3.
Switch steps 3 and 4.
Move step 1 to appear after step 4.
Move step 4 to appear after step 1.

Answer 1

Switch steps 2 and 3.

Explanation: after the cell absorbs solar energy (step 1) the electrons are freed and begin to move (step 3), then they are driven to the front of the cell by the internal electric field (step 2), and finally they flow through the external circuit as electricity (step 4).