Question

5. Two carbon film resistors, R1 = 470 Ohms and R2 = 510 Ohms are used in a circuit. Select their resistance with uncertainty based on their tolerance.

A) R1 = 470 ± 24 Ω , R2 = 510 ± 26 Ω

B) R1 = 470 ± 22 Ω , R2 = 510 ± 30 Ω

C) R1 = 470 ± 20 Ω , R2 = 510 ± 20 Ω

6. Referring to the previous question, the resistors are configured to provide maximum and minimum resistances. For each case, select the correct total resistance with uncertainty.

A) Rmax = 239 ± 35 kΩ, Rmin = 1.9 ± 9 Ω

B) Rmax = 980 ± 35 Ω, Rmin = 40 ± 9 Ω

C) Rmax = 980 ± 35 Ω, Rmin = 245 ± 9 Ω

Answer 1

5. C choose with min error

6. rseries is rmax = 980ohm

rparallel is rmin = 245 ohm

hence C