Question
In a circuit, a parallel combination of two 20-Ω and one 10-Ω resistors is connected in series with a 4-Ω resistor. The source voltage is 36 V.
1. Find the resistor(s) with the maximum current.
2. Find the resistor(s) with the maximum voltage drop.
3. Find the power dissipated in each resistor and hence the total power dissipated in all the resistors. Also find the power output of the source. Are they equal or not? Justify your answer.
4. Will the answers for questions (a) and (b) differ if a 3 Ω resistor is added in series to the 4 Ω resistor? If yes, repeat the question(s) for the new resistor combination.
5. If the values of all the resistors and the source voltage are doubled, what will be the effect on the current?
1. $R_3$ has the maximum current.
2. Each of the resistors connected in parallel have the maximum voltage drop.
3. See video.
4. No change.
5. No change.
Solution Video

# OpenStax College Physics Solution, Chapter 21, Problem 5 (Test Prep for AP® Courses) (7:10) 