Writing the Heat Loss in a wire experiment

1
Writing the Heat Loss in a wire experiment

• The things to include in a good prac write-up.

2
Title, Date and Aim

• Make sure you note a suitable title, aim and date
  it!
• A good title is The determination of Heat Loss
  in a length of Nichrome Wire.
• A not-so-good title is Nichrome Wires
• A good aim might be
• To measure the resistance of a length of nichrome
  wire using a number of different techniques and
  to use this information to determine the heat
  loss within this wire when current is passed
  through it.

3
Background Theory

• You should briefly mention
• Voltmeter-ammeter method for determining
  resistance and the fact that a typical multimeter
  uses this technique - include a diagram and Ohms
  Law.
• Wheatstone bridge method - including diagrams and
  formula.
• Resistivity R ? l/A
• Law of Heat Exchange.
• The heat loss formula - Energy I2R x t.
• The specific heat formula - Q mc?T and how the
  last 3 formulae fit together.