LEVEL 2 MODULE 1 ALTERNATING
CURRENTS | QUESTIONS AND
CORRECT SOLUTIONS| 2024
2:1 - What is the step-down turns ratio of a transformer with 200 turns in the primary
and 100 turns in the secondary?
induced high voltage - Opening the secondary of a CT under load will cause a
dangerous level of___.
40Hz - What is the hertz rating of an AC circuit if the frequency is 20 cycles per 1/2
second?
340V - Given: A circuit has an rms voltage of 120VAC. What is the peak-to-peak
voltage?
175V - A circuit has a peak voltage of 275V. What is the average voltage value?
one-third the applied voltage - Each of three equal capacitors in series has___.
XL=2piefL - The formula for inductive reactance is___.
10A - Given: An AC circuit containing resistance only. What is the current flow if the
resistance is 15 ohms and the voltage is 150v?
Lags the voltage - The current in inductive circuit___.
Rms values - Unless otherwise noted, the calculations in AC circuits use___.
Increases - When frequency decreases, capacitive reactance___.
It leads the voltage. - Which of the following is true of the current in a capacitive circuit?
0.637 x peak value - In sine wave terminology, the average value is___.
All DC rules and laws apply, including Ohm's law - In AC circuits containing only
resistance,___.
Increases - If the area of the plates of a capacitor is increased, the amount of
capacitance___.
CURRENTS | QUESTIONS AND
CORRECT SOLUTIONS| 2024
2:1 - What is the step-down turns ratio of a transformer with 200 turns in the primary
and 100 turns in the secondary?
induced high voltage - Opening the secondary of a CT under load will cause a
dangerous level of___.
40Hz - What is the hertz rating of an AC circuit if the frequency is 20 cycles per 1/2
second?
340V - Given: A circuit has an rms voltage of 120VAC. What is the peak-to-peak
voltage?
175V - A circuit has a peak voltage of 275V. What is the average voltage value?
one-third the applied voltage - Each of three equal capacitors in series has___.
XL=2piefL - The formula for inductive reactance is___.
10A - Given: An AC circuit containing resistance only. What is the current flow if the
resistance is 15 ohms and the voltage is 150v?
Lags the voltage - The current in inductive circuit___.
Rms values - Unless otherwise noted, the calculations in AC circuits use___.
Increases - When frequency decreases, capacitive reactance___.
It leads the voltage. - Which of the following is true of the current in a capacitive circuit?
0.637 x peak value - In sine wave terminology, the average value is___.
All DC rules and laws apply, including Ohm's law - In AC circuits containing only
resistance,___.
Increases - If the area of the plates of a capacitor is increased, the amount of
capacitance___.
