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ALTERNATING CURRENTS LEVEL 2 MODULE 1 QUESTIONS WITH CORRECT DETAILED ANSWERS LATEST UPDATE
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ALTERNATING CURRENTS LEVEL 2 MODULE 1 QUESTIONS WITH CORRECT DETAILED ANSWERS LATEST UPDATE
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Page 1 of 16ALTERNATING CURRENTS LEVEL 2 MODULE 1
QUESTIONS WITH CORRECT DETAILED
ANSWERS LATEST UPDATE 2024-2025
What is the step-down turns ratio of a transformer with 200 turns in the primary
and 100 turns in the secondary? - ANSWER✔✔2:1
Opening the secondary of a CT under load will cause a dangerous level of___. -
ANSWER✔✔induced high voltage
What is the hertz rating of an AC circuit if the frequency is 20 cycles per 1/2
second? - ANSWER✔✔40Hz
Given: A circuit has an rms voltage of 120VAC. What is the peak-to-peak voltage? -
ANSWER✔✔340V
A circuit has a peak voltage of 275V. What is the average voltage value? -
ANSWER✔✔175V
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Each of three equal capacitors in series has___. - ANSWER✔✔one-third the
applied voltage
The formula for inductive reactance is___. - ANSWER✔✔XL=2piefL
Given: An AC circuit containing resistance only. What is the current flow if the
resistance is 15 ohms and the voltage is 150v? - ANSWER✔✔10A
The current in inductive circuit___. - ANSWER✔✔Lags the voltage
Unless otherwise noted, the calculations in AC circuits use___. - ANSWER✔✔Rms
values
When frequency decreases, capacitive reactance___. - ANSWER✔✔Increases
Which of the following is true of the current in a capacitive circuit? -
ANSWER✔✔It leads the voltage.
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In sine wave terminology, the average value is___. - ANSWER✔✔0.637 x peak
value
In AC circuits containing only resistance,___. - ANSWER✔✔All DC rules and laws
apply, including Ohm's law
If the area of the plates of a capacitor is increased, the amount of capacitance___.
- ANSWER✔✔Increases
The self-induced voltage across in inductance is equal to the change in___. -
ANSWER✔✔Current with respect to time
Given: A 30-microfarad capacitor in parallel with a 15-microfarad capacitor. The
total capacitance is___. - ANSWER✔✔45
Which of the following opposes any change in circuit current? -
ANSWER✔✔Inductance
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