Series Resistence, Series Current, Voltage drops, KVL, open-circuit troubleshooting

How many current paths are in a basic series circuit?

One

R1 = 100 Ω, R2 = 200 Ω, and R3 = 300 Ω are in series. What is RT?

600 Ω (add all the Rs for Rtotal)

What is true about current in a basic series circuit?

It is the same through every component

How is total series resistance calculated?

Add all resistor values

In series, which resistor receives the larger voltage drop?

The larger resistance

Two equal resistors are in series. How do their voltage drops compare?

They are approximately equal

What happens when any point in a series path opens?

Normal current stops throughout the circuit

What should the series voltage drops equal?

The measured source voltage

Series current is 20 mA and R1 = 100 Ω. What is V1?

2 V

Where are DMM probes placed to measure V2?

Across R2

A 12 V source supplies a series circuit with 600 Ω total resistance. What is the current?

20 mA

Series current is 20 mA and R2 = 200 Ω. What is V2?

4 V

Series current is 20 mA and R3 = 300 Ω. What is V3?

6 V

Which relationship represents Kirchhoff's Voltage Law for one series loop?

VT = V1 + V2 + V3

If voltage is present before a wire break and 0 V after it, where is the likely open?

Between the two test points

R1 = 1 kΩ and R2 = 2.2 kΩ are in series. What is RT?

3.2 kΩ

What is the best check after measuring V1 and V2 in a two-resistor series circuit?

Verify V1 + V2 is approximately VT

A 9 V source supplies a series circuit with 3.2 kΩ total resistance. What is the current?

2.81 mA

For 9 V across 1 kΩ and 2.2 kΩ in series, which resistor has the larger drop?

R2, the 2.2 kΩ resistor

Which workflow is best for a beginning technician?

Predict, connect, measure, compare

R1 = 220 Ω, R2 = 330 Ω, and R3 = 450 Ω are in series. What is RT?

1,000 Ω

Voltage-drop measurements are made with the circuit:

Energized

If only R1 is in the series path, total resistance equals:

R1

Total-resistance measurements are made with the circuit:

De-energized

VT = 20 V, V1 = 5 V, and V2 = 7 V in a series circuit. What is V3?

8 V

In one series loop, I1, I2, and I3 are:

Equal

Adding resistance in series causes total current to:

Decrease

If a resistor is accidentally bypassed by a wire, its voltage drop will be approximately:

0 V

A reading changes from source voltage to 0 V between two test points. The likely open is:

Between those test points

A 24 V source supplies 200 Ω, 400 Ω, and 600 Ω in series. What is the current?

20 mA