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Electrical Level 1 - Chapter 26104-14
Electrical Theory
25
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Professional
02/05/2017

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Term
The formula for calculating the total resistance in a series circuit with three resistors is _____.
Definition
Rt = R1 + R2 + R3
Term
Find the total resistance in a series circuit with R1 = 10ohm, R2 = 20ohm, and R3 = 30ohm.
Definition
Rt = 60ohm
Term
The formula for calculating the total resistance in a parallel circuit with three resistors is _____.
Definition
Rt = 1/( (1/R1)+(1/R2)+(1/R3) )
Term
[image]
Definition
100 ohms
Term
In a parallel circuit, the voltage across each path is equal to the ____.
Definition
Applied voltage
Term
[image]
Definition
5 amps
Term
A resistor of 32-ohms is in parallel with a resistor of 36-ohms, and a 54-ohm resistor is in series with the pair. When 350V is applied to the combination, the current through the 54-ohm resistor is ____.
Definition
4.93 amps
Term
A 242-ohm resistor is in parallel with a 180-ohm resistor, and a 420-ohm resistor is in series with the combination in a 27-volt circuit. A current of 22mA flows through the 242-ohm resistor. The current throuth the 180-ohm resistor is ____.
Definition
29.6mA
Term
Kirchhoff's voltage law states that the algebraic sum of the voltages around any closed current path is ____.
Definition
zero
Term
Two 24-ohm resistors are in parallel, and a 42-ohm resistor is in series with the combination. When 78V is applied to the three resistors, the voltage drop across the 42-ohm resistor is about ____.
Definition
60.7 Volts
Term
_______ states that the total amount of current flowing through a parallel circuit is equal to the sum of the amounts of current flowing through each current path.
Definition
Kirchhoff's Current Law
Term
_______ states that the sum of all the voltage drops in a circuit is equal to the source voltage of the circuit.
Definition
Kirchhoff's Voltage Law
Term
_____ contain both series and parallel current paths.
Definition
Series-Parallel circuits
Term
_______ contain two or more parallel paths through which current can flow.
Definition
Parallel circuit
Term
______ contain only one path for current flow.
Definition
Series circuits
Term
[image]
Definition
C
Term
If two or more resistors are connected in parallel, the ______.
Definition
Total resistance is lower than any single resistor.
Term
You can use Ohm's law to find the value of each branch current in a parallel circuit. (T/F)
Definition
True
Term
Parallel circuits are current dividers. (T/F)
Definition
True
Term
[image]
Definition
The statement "Kirchhoff's laws apply to current only" is false.
Term
In a series circuit, ETmust equal the sum of the individual voltage drops. (T/F)
Definition

True

 

Term
When calculating Series-Parallel combination circuits, it is important to _____.
Definition

Reduce to series loads, then add the loads,

Replace parallel combinations with one value,

and Reduce to simpler circuits where possible.
In other words, All of the above.

Term
Kirchhoff's Voltage Law can be used to determine voltage drops. (T/F)
Definition
True
Term
Two resistors are connected in parallel; R1 = 90Ω, R2 = 45Ω. What is the total resistance of R1 and Rin parallel?
Definition
30Ω
Term

Two resistors are connected in parallel; R2 is 90Ω, R3 is 45Ω. A third resistor (R1, which is 20Ω) is connected in series with R2 and R3.
A). What is the total resistance of this circuit?

B). If the voltage source of this circuit is 150V, what is the total current flow?

Definition

A). 50Ω

B). 3A

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