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AC theory level 2 EXAM STUDY GUIDE WITH
COMPLETE 200 QUESTIONS AND SOLUTIONS LATEST
UPDATE JUST RELEASED THIS YEAR
Question: Given a simple RLC circuit
E = 150 V
F = 60 Hz
X_L_ = 60 ohms
X_C_ = 30 ohms
R = 50 ohms
Find current for the capacitive branch - CORRECT ANSWER✔✔I_C_ = E / X_C_
I_C_ =
I_C_ = 5 A
6Q9
Question: Given a simple RLC circuit
E = 150 V
F = 60 Hz
X_L_ = 60 ohms
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X_C_ = 30 ohms
R = 50 ohms
What is the phase relationship b/w I_L_ and I_C_ shown - CORRECT ANSWER✔✔180 degrees
b/c
IL lags E by 90°, and IC leads E by 90°; therefore, IL and IC are 180° out-of-phase with respect to
each other.
6Q10
Question: Given a simple rlc crkt
E = 120 V
F = 60 Hz
I_L_ = 14 A
I_C_ = 6 A
I_R_ = 12 A
What is the true power of the circuit shown? - CORRECT ANSWER✔✔P_true_ = e * I_R_
= 120 * 12
= 1,440 W
6Q11
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QUESTION:A parallel RLC circuit must contain at least three branches. - CORRECT
ANSWER✔✔True
For example
Br1 `- L
Br2 - C
Br3 - R
6Q1
Question: In parallel RLC circuits, the ? is the same and is ? phase across all branches and is
used as the main reference
for calculations. - CORRECT ANSWER✔✔voltage / in
Note: This question references only the phase relationship with ET, ER, EL, and EC.
6Q2
Question: Considering the phase relationship between current and voltage in a parallel RLC
circuit, the resistive current is ? . - CORRECT ANSWER✔✔0° in-phase
6Q3
Question: Considering the phase relationship between current and voltage in a parallel RLC
circuit, the inductive current is ? . - CORRECT ANSWER✔✔90 degrees lagging
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6Q4
Question: Considering the phase relationship between current and voltage in a parallel RLC
circuit, the capacitive current is ? . - CORRECT ANSWER✔✔90 degrees leading
6Q5
Question: True or False
In a parallel circuit that contains both XL and XC, the reactive currents add. - CORRECT
ANSWER✔✔False
Note: Current in an inductive branch is 180° out-of-phase with current in capacitive branch;
therefore, the currents will subtract.
6Q6
Question: Given a simple RLC circuit
E = 150 V
F = 60 Hz
X_L_ = 60 ohms
X_C_ = 30 ohms
R = 50 ohms
AC theory level 2 EXAM STUDY GUIDE WITH
COMPLETE 200 QUESTIONS AND SOLUTIONS LATEST
UPDATE JUST RELEASED THIS YEAR
Question: Given a simple RLC circuit
E = 150 V
F = 60 Hz
X_L_ = 60 ohms
X_C_ = 30 ohms
R = 50 ohms
Find current for the capacitive branch - CORRECT ANSWER✔✔I_C_ = E / X_C_
I_C_ =
I_C_ = 5 A
6Q9
Question: Given a simple RLC circuit
E = 150 V
F = 60 Hz
X_L_ = 60 ohms
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X_C_ = 30 ohms
R = 50 ohms
What is the phase relationship b/w I_L_ and I_C_ shown - CORRECT ANSWER✔✔180 degrees
b/c
IL lags E by 90°, and IC leads E by 90°; therefore, IL and IC are 180° out-of-phase with respect to
each other.
6Q10
Question: Given a simple rlc crkt
E = 120 V
F = 60 Hz
I_L_ = 14 A
I_C_ = 6 A
I_R_ = 12 A
What is the true power of the circuit shown? - CORRECT ANSWER✔✔P_true_ = e * I_R_
= 120 * 12
= 1,440 W
6Q11
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QUESTION:A parallel RLC circuit must contain at least three branches. - CORRECT
ANSWER✔✔True
For example
Br1 `- L
Br2 - C
Br3 - R
6Q1
Question: In parallel RLC circuits, the ? is the same and is ? phase across all branches and is
used as the main reference
for calculations. - CORRECT ANSWER✔✔voltage / in
Note: This question references only the phase relationship with ET, ER, EL, and EC.
6Q2
Question: Considering the phase relationship between current and voltage in a parallel RLC
circuit, the resistive current is ? . - CORRECT ANSWER✔✔0° in-phase
6Q3
Question: Considering the phase relationship between current and voltage in a parallel RLC
circuit, the inductive current is ? . - CORRECT ANSWER✔✔90 degrees lagging
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6Q4
Question: Considering the phase relationship between current and voltage in a parallel RLC
circuit, the capacitive current is ? . - CORRECT ANSWER✔✔90 degrees leading
6Q5
Question: True or False
In a parallel circuit that contains both XL and XC, the reactive currents add. - CORRECT
ANSWER✔✔False
Note: Current in an inductive branch is 180° out-of-phase with current in capacitive branch;
therefore, the currents will subtract.
6Q6
Question: Given a simple RLC circuit
E = 150 V
F = 60 Hz
X_L_ = 60 ohms
X_C_ = 30 ohms
R = 50 ohms
