Engineering Board Exam Reviewer · Series-Parallel Circuits · easy
In the series-parallel circuit shown, V=28 V, R1=20, , R2=40, , and R3=10, . Find the total resistance seen by the source.
- 70,
- 28,
- 5.71,
- 8.57,
Answer
B. 28,
Solution
R2 and R3 are in parallel: R23=R2R3/R2+R3=(40, )(10, )/40, +10, =8, . This is in series with R1: RT=R1+R23=20, +8, =28, .
More Series-Parallel Circuits questions
- In the series-parallel circuit shown, V=42 V, R1=6, , R2=20, , and R3=60, . Find the total resistance seen by the source.
- A 6, resistor and a 3, resistor are connected in parallel, and this pair is in series with a 4, resistor. The whole network dissipates 150…
- Three identical lamps are connected so that two of them are in parallel, and this pair is in series with the third lamp, all across a…
- In the bridge circuit shown, V=12 V, R1=10, , R2=40, , R3=100, , and R4=800, . The detector R5 is removed (open circuit between B and C)…
- In the ladder network shown, V=25 V, R1=10, , R2=20, , R3=51, , and R4=9, . Find the voltage at point B with respect to the negative…
- In the circuit shown, V=120 V, R1=12, , R2=12, , R3=8, , and R4=30, . Find the voltage across R2.
- In the circuit shown, V=9 V, R1=10, , R2=10, , and RL=40, . By how many volts does the voltage across R2 fall when the load RL is…
- A voltage divider uses R1=R2=10 k across a 12 V source. A 10 k load is connected across R2. What is the output voltage across the load?
- A 10, resistor is connected in series with two 20, resistors that are in parallel with each other. What is the total resistance?
- The Wheatstone bridge shown is balanced. V=24 V, R1=30, , R2=90, , R3=20, , R4=60, , and R5=500, . Find the total resistance seen by the…