NCCER Electrical Level 1 Mod 4 Electrical
Theory
Which of the following is true regarding a series circuit? - ANS The current flow is the same through all
resistors.
K
Which of the following is true regarding a parallel circuit? - ANS It has more than one path for current
to flow.
C
Which of the following is true regarding a series-parallel circuit? - ANS If a circuit is reduced to an
equivalent series circuit, the total resistance is found by adding the loads.
LO
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 is the current I2 in branch R2? - ANS 15A
Who stated that the current entering a point must equal the total current leaving that point? - ANS
Kirchoff
YC
In a circuit with an applied voltage of 10V and voltage drops of E1 = 2V, E2 = 5V, and E3 = ?, the value
of E3 must be____________. - ANS 3V
You can use Ohm's law to find the value of each branch current in a parallel circuit. - ANS True
D
Find the total resistance in a series circuit with three resistances of 100Ω, 20Ω, and 30Ω. - ANS 60
U
In a parallel circuit, the voltage across each path is equal to the _____________. - ANS applied voltage
A resistor of 32Ω is in parallel with a resistor of 36Ω, and a 54Ω resistor is in series with the pair. When
ST
350V is applied to the combination, the current through the 54Ω resistor is ____________. - ANS 4.93A
A 242Ω resistor is in parallel with a 180Ω resistor, and a 420Ω resistor 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 _____________. - ANS 29.6mA
Which statement is not correct relative to Kirchhoff's current law? - ANS Kirchhoff's laws apply to
current only.
Kirchhoff's voltage law states that the algebraic sum of the voltages around any closed current path is
________. - ANS zero
Theory
Which of the following is true regarding a series circuit? - ANS The current flow is the same through all
resistors.
K
Which of the following is true regarding a parallel circuit? - ANS It has more than one path for current
to flow.
C
Which of the following is true regarding a series-parallel circuit? - ANS If a circuit is reduced to an
equivalent series circuit, the total resistance is found by adding the loads.
LO
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 is the current I2 in branch R2? - ANS 15A
Who stated that the current entering a point must equal the total current leaving that point? - ANS
Kirchoff
YC
In a circuit with an applied voltage of 10V and voltage drops of E1 = 2V, E2 = 5V, and E3 = ?, the value
of E3 must be____________. - ANS 3V
You can use Ohm's law to find the value of each branch current in a parallel circuit. - ANS True
D
Find the total resistance in a series circuit with three resistances of 100Ω, 20Ω, and 30Ω. - ANS 60
U
In a parallel circuit, the voltage across each path is equal to the _____________. - ANS applied voltage
A resistor of 32Ω is in parallel with a resistor of 36Ω, and a 54Ω resistor is in series with the pair. When
ST
350V is applied to the combination, the current through the 54Ω resistor is ____________. - ANS 4.93A
A 242Ω resistor is in parallel with a 180Ω resistor, and a 420Ω resistor 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 _____________. - ANS 29.6mA
Which statement is not correct relative to Kirchhoff's current law? - ANS Kirchhoff's laws apply to
current only.
Kirchhoff's voltage law states that the algebraic sum of the voltages around any closed current path is
________. - ANS zero
