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State the purpose of the coloured bands on the fixed resistor shown - Leaving Cert Engineering - Question b - 2008
Question b
State the purpose of the coloured bands on the fixed resistor shown. Identify any two copper alloys.
Worked Solution & Example Answer:State the purpose of the coloured bands on the fixed resistor shown - Leaving Cert Engineering - Question b - 2008
Step 1
State the purpose of the coloured bands on the fixed resistor shown.
Answer
The coloured bands on a fixed resistor serve as a code to indicate its resistance value. Each colour corresponds to a specific digit according to the resistor colour code. This allows users to quickly determine the resistance value without needing to measure it physically. The first two bands indicate significant figures, the third band serves as a multiplier, and the fourth band represents tolerance.
Step 2
Identify any two copper alloys.
Answer
Two common copper alloys are:
- Bronze: This alloy primarily consists of copper and tin, known for its strength and resistance to corrosion.
- Brass: An alloy made of copper and zinc, recognized for its malleability and acoustic properties, often used in musical instruments and fittings.