Physics (Essay) Paper 2 WASSCE (SC), .2019

Question 5

 

 

Explain each of the following terms as used in Electronics.
(a) free electrons;
(b) holes.

 

Observation

 

A good percentage of the candidates provided the wrong response.

The expected answer


Explanation of terms
(a) Free electrons
Negative charge carriers

(b) Holes
Positive charge carriers