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