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Level 2 Module 1 Alternating Currents correctly answered rated A+ 2023/2024

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Level 2 Module 1 Alternating Currents 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___. Current with respect to time The self-induced voltage across in inductance is equal to the change in___. 45 Given: A 30-microfarad capacitor in parallel with a 15-microfarad capacitor. The total capacitance is___. Inductance Which of the following opposes any change in circuit current? Phase relationships that exist between voltage and current in an inductive circuit "ELI the ICE MAN" is used to remember___. Greater than the true power According to the power triangle, the apparent power is___. Transformer Which of the following uses electromagnetic induction to transfer electrical energy from

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Level 2 Module 1 Alternating Currents

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

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Institution
NCCER
Course
NCCER

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Uploaded on
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