Assignment

1. Manganin wires are used in resistance boxes. Why?

2. A carbon resistor has colour stripes with sequence yellow, violet, brown and gold. What is the value of the resistor?

3. A copper wire of length 10 m has resistance 2 ohm per meter at 20°C. Find its resistance at 50°C.
Temperature coefficient of resistance = 3.8 × 10^-4 °C^-1

4. A silver wire has a resistance 2.1 Ohm at 27.5°C and 2.7 Ohm at 100°C. Determine the temperature coefficient of resistance.

5. Find the resistance of the unknown wire 2 in the simulator at 75°C.