If R1 is in series with parallel connected to R2 and R3, what happens to total c

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Question
If R₁ is in series with parallel connected to R₂ and R₃, what happens to total current if R₂ opens?
Options
A. increases
B. decreases
C. remains the same
D. cannot tell

Correct Answer

decreases

Series-Parallel Circuits problems

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3.

In the given circuit, what is R_UNK equal to if R_V must be adjusted to 1,232 Ω in order to balance the bridge?
Options
A. 220 Ω
B. 6,899 Ω
C. 1,232 Ω
D. More information is needed in order to find R_UNK.

4. What is the power dissipated by R1, R2, and R3?
Options
A. P1 = 0.13 W, P2 = 0.26 W, P3 = 0.12 W
B. P1 = 0.26 W, P2 = 0.52 W, P3 = 0.23 W
C. P1 = 0.52 W, P2 = 0.92 W, P3 = 0.46 W
D. P1 = 1.04 W, P2 = 1.84 W, P3 = 0.92 W

6. The first goal(s) to accomplish in analyzing a complex series?parallel circuit is to:
Options
A. equate all parallel components
B. equate all series components
C. solve for all the voltage drops
D. solve for the total current and resistance

9. If a series?parallel circuit has all 30-ohm resistors, what is the total resistance when R₁ is in series with a parallel circuit consisting of R₂ and R₃?
Options
A. 10 ohms
B. 20 ohms
C. 45 ohms
D. 90 ohms

10. What is the total resistance of a circuit when R₁ (7 k Ω) is in series with a parallel combination of R₂ (20 k Ω), R₃ (36 k Ω), and R₄ (45 k Ω)?
Options
A. 4 k Ω
B. 17 k Ω
C. 41 k Ω
D. 108 k Ω

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