Physics (Essay) Paper 2 WASSCE (PC), 2018

Question 7

 

  1. Sketch the symbol of two-input NAND gate
  2. Write down the truth table of a two-input NAND gate

 

Observation

 

Candidates’ performance was poor. Few candidates who attempted the question could not draw the correct diagram or even write down the truth table. Performance was low

The expected answer is