4. Using a 1 W resistor (R = 4700), vary the input voltage from 6 to 20 volts. Measure V and I and calculate the resistance R (by calculating the ratio V/I) and the power dissipated in the resistance (by calculating the product VI). As the measurement proceeds, touch the resistor from time to time to observe the temperature rise. Record the results in Table 2. H COLOR Black Brown Red Orange Yellow Green Blue Violet Grey White Gold Silver 4-Band-Code 2%, 5%, 10% 1st BAND 0 1 2 3 4 5 10 7 00 9 2nd BAND 0 1 5-Band-Code 2 3 4 5 6 7 8 9 0.1%, 0.25%, 0.5%, 1% 3rd BAND 0 1 2 3 4 5 6 7 8 9 MULTIPLIER 10 100 10002 1KQ 10KQ 100K 1ΜΩ 10ΜΩ 0.1 0.01 560k ± 5% TOLERANCE ± 1% ± 2% ±0.5% ±0.25% (C) ±0.10% (B) ±0.05% ± 5% ± 10% 2370±1% Po (1) (K)

Fig: 1