Answer:
a) 19 or select the closest answer
b) 5%
Explanation:
a)
from the voltage divide rule
[tex]V_{in} = V_0 * \frac{R_2}{R_2 + R_f}[/tex]
[tex]\frac{V_0}{V_{in}} = \frac{R_2 + R_f}{R_2} => 1 + \frac{R_f}{R_2} = 20[/tex]
[tex]\frac{R_f}{R_2} = 19[/tex]
Select the nearest answer
b)
obtained gain = [tex]\frac{V_0}{V_{in}} = 1 + \frac{36}{2} = 19[/tex]
Expected gain = [tex]\frac{V_0}{V_{in}} = 20[/tex]
∴ error = |[tex]\frac{19 - 20}{20}[/tex]| × 100
= 1/20 × 100
= 5%
