Module 26104-20 Electrical Theory
True or False? In a series circuit, ET must equal the sum of the individual voltage drops.
True
True or False? Kirchhoff's voltage law can be used to determine voltage drops.
True
A 242Ω resistor is in parallel with a 180Ω resistor, and a 420Ω is in series with the combination in a 27V circuit. A current of 22mA flows through the 242Ω resistor. The current through the 180Ω resistor is ______?
29.6mA
Two resistors are connected in parallel; R1 is 90Ω, R2 is 45Ω. What is the total resistance of R1 and R2 in parallel. If the voltage source of this circuit is 150V, what is the total current flow?
3A
Who stated that the current entering a point must equal the total current leaving that point?
kirchhoff
In a circuit with an applied voltage of 10V and the voltage drop of E1 = 5V, and E3= ?, the value of E3 must be__________?
3V
The value for total current in figure RQ02 is _______?
5A
Two 24Ω resistors are in parallel, and a 42Ω resistor is in series with the combination. When 78V is applied to the resistors, the voltage drop across the 42Ω resistor is about _____?
60.5V
Find the total resistance in a series circuit with three resistances of 10Ω, 20Ω, & 30Ω.
60Ω
Which of the following is true regarding a parallel circuit?
It has more than one path for current flow.
Which statement is not correct relative to Kirchhoff's law?
Kirchhoff's law applies to current only.
In a parallel circuit, the voltage across each path is equal to the _________?
applied voltage
The total resistance in RQ01 is ________?
100Ω
Two branches of a circuit (R1 and R2) across a 120V power line draw a total line current of 30A. Branch R1 takes 15A. What s the current I2 in branch R2?
15A
A resistor of 32Ω is in parallel with a resistor of 36Ω, and a 54Ω resistor is in series with the pair. When 350V is applied to the combination, the current through the 54Ω resistor is ________?
4.93A
______________ contain two or more parallel paths through which the current can flow.
Parallel circuits
the formula for calculating the total resistance in a parallel circuit with three resistors is __________?
RT = 1/ (1/R1 + 1/R2 + 1/R3)
True or False? You can use ohm's law to find the value of each branch current in a parallel circuit.
True
A ___________ contains only one path for current to flow.
series circuit
If two or more resistors are connected in parallel, the _______.
total resistance is lower than any single resistor
True or False? Parallel circuits are current dividers.
True
The formula for calculating the total resistance in a series circuit with three resistors is ____________?
RT = R1 + R2 + R3
Kirchhoff's voltage law states that the algebraic sum of the voltages around any closed current path is ______?
Zero
Which of the following is true regarding a series-parallel circuit?
If a circuit is reduced to an equivalent series circuit, the total resistance is found by adding the loads.
_______ 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.
Kirchhoff's current law
____________ states the the sum of all the voltage drops in a circuit is equal to the source voltage of the circuit
Kirchhoff's voltage law
Which formula is used for series circuits?
RT = R1 + R2 = R3
____________ contain both series and parallel current paths.
Series-parallel circuits
Which of the following is true regarding a series circuit?
The current flow is the same through all resistors.
Two resistors are connected in parallel; R1 is 90Ω, R2 is 45Ω. What is the total resistance of R1 and R2 in parallel. What is the total resistance of this circuit
50Ω
When calculating series-parallel combination circuits, it is important to ___________.
All of the the answers.
