For the resistor shown below, find the resistance and the tolerance, written as a percent.
A) 870000 Ω , ±10%
B) 810 Ω , ±10%
C) 170 Ω , ±20%
D) 870 Ω , ±10%
E) 170 Ω , ±10%

Question

For the resistor shown below, find the resistance and the tolerance, written as a percent. 
A) 870000 Ω , ±10% 
B) 810 Ω , ±10% 
C) 170 Ω , ±20% 
D) 870 Ω , ±10% 
E) 170 Ω , ±10%

Quizplus · Accepted Answer

The resistor color code can be used to determine the resistance and tolerance of the resistor. From the image, we can see that the first band is brown, indicating a value of 1. The second band is red, indicating a value of 2. The third band is black, indicating a multiplier of 10^0, or 1. Therefore, the resistance is 12 Ω (1 2 x 1). The fourth band is gold, indicating a tolerance of ±5%. However, the answer choices do not include 12 Ω with a ± 5% tolerance, so we must use the closest option, which is 870 Ω with a ± 10% tolerance (option D).

For the Resistor Shown Below, Find the Resistance and the Tolerance