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Year 1 Substation 3 > DC Circuit Analysis Series and Parallel > Flashcards

DC Circuit Analysis Series and Parallel Flashcards

1
Q

What are the four rules for a series circuit?

A
  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
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2
Q

A series circuit means ?

A

There is only one path for current to flow

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3
Q

Each resistor in the series circuit…..

A

Adds to the total resistance

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4
Q

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

A

Directly Proportional

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5
Q

What are Kirchoff’s Laws?

A

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

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6
Q

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

A

Series-Additive

Series-Opposing

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7
Q

Series Additive Combinations means…..

A

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.

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8
Q

Series Opposing means…

A

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.

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9
Q

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

A

2

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10
Q

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?

A

False

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11
Q

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

A
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12
Q

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

A
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13
Q

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

A
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14
Q

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

A
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15
Q

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

A
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16
Q

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

A

increase

17
Q

What is the Law of Proportionality?

A
18
Q

What are Voltage Dividers?

A

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

19
Q

Parallel circuit have ?

A

More than once path for current flow.

20
Q

Parallel branches have the same ?

A

Voltage applied

21
Q

Total Current in a Parallel circuit is ?

A

Sum of the current flowing from each branch of the circuit

22
Q

What is the Parallel current rule?

A

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

23
Q

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

A

The more total current increases.

24
Q

What is the rule for parallel circuit resistance?

A

The total resistance is less than the smallest branch resistor.

25
Q

What is the reciprocal equation for parallel resistance?

A
26
Q

What is the parallel circuit voltage rule?

A

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

27
Q

What is the purpose to connect voltage sources in parallel?

A

To supply more current to the circuit.

28
Q

What is another advantage to placing power sources in parallel?

A

An increased lifetime for each individual source.

29
Q

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

A

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

30
Q

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.

A

The Direct Method

31
Q

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.

A

Indirect Method

Year 1 Substation 3 (7 decks)

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