Physics Paper 3 WASSCE (PC 2ND), 2018

Question 3

 

 

 

Observation

 

  • Plot a graph using reasonable scales
  • Draw line of best it
  • Determine the slope and intercept of the graph
  • State any two of the following precautions.                          

e.g.

  • Ensured key is disconnected/removed when not in use
  • Ensured terminals are clean
  • Ensured terminals are tight
  • Avoided parallax error on voltmeter
  • Noted/corrected zero error on voltmeter
  • Repeated readings stated

b(i)      Factors Affecting the Resistance of a Wire

      e.g.

  • Temperature
  • Length
  • Cross sectional area/thickness/diameter/radius
  • Nature of material/resistivity