DC Circuit Analysis Series and Parallel

Question 1

What are the four rules for a series circuit?

Answer 1

1. Current is the same wherever it is measured in a circuit
2. Total Voltage of the circuit is the sum of all the component voltages values in the circuit
3. Total resistance of the circuit is the sum of all the individual resistor values
4. Total power is the sum of the individual circuit watt dissipations

Question 2

A series circuit means ?

Answer 2

There is only one path for current to flow

Question 3

Each resistor in the series circuit…..

Answer 3

Adds to the total resistance

Question 4

Total Voltage and Total Current are ? is Total Resistance is constant

Answer 4

Directly Proportional

Question 5

What are Kirchoff’s Laws?

Answer 5

Current Law: Algebraic sum of the currents entering and leaving any node is zero
Voltage Law: Algebraic sum of the voltages around any closed path is zero

Question 6

What are two types of combinations that can be made with Voltage Sources?

Answer 6

Series-Additive

Series-Opposing

Question 7

Series Additive Combinations means…..

Answer 7

The voltage sources are connected in series with the positive terminal connected to the negative terminal. The voltage sources are added together to create a larger source voltage.

Question 8

Series Opposing means…

Answer 8

The voltage sources are connected in series with the Positive Terminal is in series with Positive terminal. The Total Source voltage will be the difference between the larger voltage and the smaller voltage.

Question 9

To solve for an unknown value, a person must know ? of the four possible values (resistance, voltage, current, power) for the component.

Answer 9

2

Question 10

In some instances, it is not possible to solve for an unknown value; in these instances, an estimated value will need to be used. True or False?

Answer 10

False

Question 11

When the total current and total voltage is known, what formula is used to solve for total resistance?

Answer 11

Question 12

What equation represents the rule for total voltage in a series circuit?

Answer 12

Question 13

What equation represents the rule for total resistance in a series circuit?

Answer 13

Question 14

What equation represents the rule for total current in a series circuit?

Answer 14

Question 15

What equation represents the rule for total power in a series circuit?

Answer 15

Question 16

In a series circuit, decreasing the size of the circuit conductor would ? the total resistance of the circuit.

Answer 16

increase

Question 17

What is the Law of Proportionality?

Answer 17

Question 18

What are Voltage Dividers?

Answer 18

Circuits where the voltage is divided between two or more resistors.

Question 19

Parallel circuit have ?

Answer 19

More than once path for current flow.

Question 20

Parallel branches have the same ?

Answer 20

Voltage applied

Question 21

Total Current in a Parallel circuit is ?

Answer 21

Sum of the current flowing from each branch of the circuit

Question 22

What is the Parallel current rule?

Answer 22

The sum of the individual branch currents equals the total current source.

Question 23

What happens when you add more resistors in parallel in a parallel circuit?

Answer 23

The more total current increases.

Question 24

What is the rule for parallel circuit resistance?

Answer 24

The total resistance is less than the smallest branch resistor.

Question 25

What is the reciprocal equation for parallel resistance?

Answer 25

Question 26

What is the parallel circuit voltage rule?

Answer 26

The voltage across each branch of a parallel circuit is the same as any other branch in parallel.

Question 27

What is the purpose to connect voltage sources in parallel?

Answer 27

To supply more current to the circuit.

Question 28

What is another advantage to placing power sources in parallel?

Answer 28

An increased lifetime for each individual source.

Question 29

If voltages sources are connected in parallel and are not of equal power capacity, what happens?

Answer 29

The larger source will generally contribute more of the circuit current.

Question 30

The ? method is used to determine total power in a parallel circuit when that power is determined from the total current, total resistance, and total voltage of the circuit.

Answer 30

The Direct Method

Question 31

The ? method is used to determine total power in a parallel circuit from the sum of the individual power consumption of the loads in the circuit.

Answer 31

Indirect Method