Module 26104-20 Electrical Theory
True or False? In a series circuit, ET must equal the sum of the individual 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
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
True or False? Kirchhoff's voltage law can be used to determine voltage drops.
True
Who stated that the current entering a point must equal the total current leaving that point?
kirchhoff
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.
