Chapter 13: Solving the DC Series-Parallel Circuit

Arrange in sequential order the steps required to calculate the total resistance of a series-parallel circuit. A) The circuit is split into parts based on series of parallel connection. B) Parts in the circuit are reduced one at a time. C) The equivalent resistor is replaced by the original resistors.

1) The circuit is split into parts based on series of parallel connection. 2) Parts in the circuit are reduced one at a time. 3) The equivalent resistor is replaced by the original resistors.

Two two-wire circuits. A conventional two-wire circuit can be replaced by an equivalent _____ circuit to accomplish the same result shown in the image. Multiple choice question. five-wire three-wire four-wire one-wire

A conventional two-wire circuit can be replaced by an equivalent three-wire circuit to accomplish the same result.

Yes, the question doesn't tell you the circuit. There are two 120 V batteries, connected in series, with the neutral between them. There's a light connected in series with a 120 V battery, and there's a motor connected in series with the other 120 V battery, and they all join in the neutral wire. The motor is connected in series with both batteries, but parallel with the light and motor. Select all that apply Which of the following occur when the fuse nearest to the motor in a three-wire circuit blows? Multiple select question. The heater and the motor operate at a voltage higher than normal operating voltage. The value of voltage across the light will be 240-V. A single 120-V supply will be applied to the circuit. The 240-V heater and the 120-V motor loads will be connected in series with one another to the 120-V supply.

A single 120-V supply will be applied to the circuit. The 240-V heater and the 120-V motor loads will be connected in series with one another to the 120-V supply.

A battery is connected to three resistors R1, R2, and R3. The voltage across each resistor is 16 volts, 8 volts, and 12 volts, respectively. Current flowing through the circuit is 2 amperes. Identify the value of the total voltage ET of the circuit shown in the image. Multiple choice question. 45 V 19 V 82 V 36 V

According to Kirchhoff's law, ET = E1 + E2 + E3. Therefore, ET = 16 + 8 + 12 = 36 V.

A voltage supply is connected to three resistors R1 = 2 ohms, R2 = 4 ohms, and R3 = 6 ohms. The currents I1 = 3 amps, I2 = 6 amps, and I3 = 4 amps flow through R1, R2, and R3, respectively. Identify the value of total current (IT) flowing through the circuit shown in the image. Multiple choice question. 24 A 8 A 13 A 4 A

According to Kirchhoff's law, IT = I1 + I2 + I3. Therefore, IT = 3 + 6 + 4 = 13 A.

Circuit Type: Series Fault: Open Symptoms:

Circuit current drops to zero. The applied voltage is dropped across the open component. The voltage across each remaining componet drops to zero.

Circuit Type: Series Fault: Short Symptoms:

Circuit current increases. The voltage across the shorted component drops to zero. The voltage across the remaining components increases.

Circuit Type: Parallel Fault: Open Symptoms:

Current through the open branch drops to zero. Total circuit current decreases. Other branches continue to operate normally.

Two batteries of 120 volts each are connected in series with each other. The negative terminal of the first battery is connected to a fuse F1. This is further connected to a 120-volt lighting load. The other end of the load is connected between the batteries via a neutral wire. The positive terminal of the second battery is connected in series with a fuse F2. This is further connected to a 120-volt motor load. The other end of the load is connected between the batteries via a neutral wire. A 240-volt heater load is connected across the lighting and motor loads. In a three-wire system, if only _____ opens, it is possible to have voltages that no longer match the requirements of the loads. Multiple choice question. fuse F1 neutral wire motor fuse F2

In a three-wire system, if only fuse F2 opens, it is possible to have voltages that no longer match the requirements of the loads.

A battery is connected to two resistors R1 = 40 ohms and R2 = 10 ohms. This is further connected in parallel to R3 = 20 ohms. Identify the value of the total resistance RT of the circuit shown in the image. Multiple choice question. 52.91 Ω 29.05 Ω 14.28 Ω 38.76 Ω

In the image, R_1 = 40 Ω, R_2 = 10 Ω, and R_3 = 20 Ω. Since resistors R_1 and R_2 are in series, R_1,2 = 40 + 10 = 50 Ω. Since R_1,2 is parallel to R_3, R_T = (50x20)/(50+20) = 14.28 Ω. The accepted answer is 14.28 Ω. The correct answer is 14.29 Ω.

_______________ current law refers to the relationship between the total current flow in a parallel circuit and the current flow through each of its branches. Multiple choice question. Ohm's Kirchhoff's Newton's Fleming's

Kirchhoff's current law refers to the relationship between the total current flow in a parallel circuit and the current flow through each of its branches.

Select all that apply. Identify the laws used to solve a series-parallel circuit. Multiple select question. Faraday's laws Ohm's law Kirchhoff's laws Lenz's law

Ohm's law and Kirchhoff's laws are used in solving a series-parallel circuit.

A circuit has four load resistors R1, R2, R3, and R4 with a combination where R1, R2, and R3 are connected in parallel to R4. Which of the following formulas is used to obtain the total power PT?

PT = P1 + P2 + P3 + P4

Select all that apply Which of the following occur when the fuse nearest to the motor in a three-wire circuit blows? Multiple select question. The 240-V heater and the 120-V motor loads will be connected in series with one another to the 120-V supply. A single 120-V supply will be applied to the circuit. The value of voltage across the light will be 240-V. The heater and the motor operate at a voltage higher than normal operating voltage.

The 240-V heater and the 120-V motor loads will be connected in series with one another to the 120-V supply. A single 120-V supply will be applied to the circuit.

Select all that apply Which of the following are observed in an open series circuit? Multiple select question. The circuit current drops to zero. The voltage across each remaining component drops to zero. The voltage across the remaining components increases. The measured resistance across all branches is 0 Ω.

The circuit current drops to zero. The voltage across each remaining component drops to zero.

Select all that apply Identify the benefits of replacing a conventional two-wire circuit by a three-wire circuit. Multiple select question. The replacement saves one wire. The replacement reduces the voltage drop. The replacement decreases the current flow. The replacement provides only a 120-V circuit.

The replacement saves one wire. The replacement reduces the voltage drop.

Identify the statements that are true of a parallel circuit with a shorted component. Multiple select question. The shorted branch causes the power supply protection device to open. The circuit current increases. The voltage across the remaining components increases. The voltage measure across any branch in the circuit is zero.

The shorted branch causes the power supply protection device to open. The voltage measure across any branch in the circuit is zero.

Circuit Type: Parallel Fault: Short Symptoms:

The shorted branch causes the power supply protection device to open. The measured resistance across all branches is 0 ohms. (The faulty branch shorts out all parallel branches.) The voltage measure across any branch is zero.

A 100 V supply is given to two resistors connected in parallel. If the current flowing through the circuit is 12 A, then what is the voltage across each resistor? Multiple choice question. 25 V 75 V 50 V 100 V

The voltages across parallel branches have the same values. Therefore, each resistor has a voltage of 100 V.

A three-wire unbalanced system with an open neutral has a 120-V circuit. True or false?

This is false. A three-wire unbalanced system with an open neutral will no longer be a 120-V circuit.

If two loads connected end to end draw a power of P1 = 30 W and P2 = 22 W, then what is the total power drawn by the circuit? Multiple choice question. 52 W 16 W 38 W 69 W

Total power is obtained by the formula PT = P1 + P2. Therefore, PT = 30 + 22 = 52 W.

Select all that apply Which of the following occur when polarity sensitive electrical and electronic devices are connected without observing their polarity? Multiple select question. The resistance across every load gets halved. The devices in the circuit get damaged. The circuit fails to operate. The number of devices required doubles.

When polarity sensitive electrical and electronic devices are connected without observing their polarity, the circuit fails to operate and the devices in the circuit get damaged.

Two batteries of 120 volts each are connected in series with each other. The negative terminal of the first battery is connected to a current source of 5 amperes. This is further connected to group 1, which consists of 4 loads connected in parallel. The other end of group 1 is connected between the batteries via a neutral wire. The other terminal of the second battery is connected in series with a current source of 5 amperes. This is further connected to group 2, which consists of 2 loads connected in parallel. The other end of group 2 is connected between the batteries via a neutral wire. Select all that apply. Which of the following are true of a three-wire unbalanced system when the neutral wire is disconnected as shown in the image? The two lines of the system will be parallel to each other. The two lines of the system will be in series with each other. The Group 2 light bulbs will glow much more brightly wit

When the neutral wire is disconnected, the two lines of the system will be in series with each other. When the neutral wire is disconnected, the Group 2 light bulbs will glow much more brightly with an increase in voltage than the Group 1 light bulbs.

Using the electron theory, as electrons pass through a circuit component, the end from which they enter is always ____________ and the end through which they leave is always ______________.

negative, -ve, or - positive, +ve, or +

If the total current has two or more paths to follow, then these components are connected in ________.

parallel

The circuit connection shown in the image is a ___________-______________ connection.

series parallel