1.0 Understand the AC Basic Circuit.

What happens to voltage and current in a purely resistive circuit?

• • They are out of phase.

• • They are in phase.

• • Current leads voltage by 90°.

• • Current leads voltage by 90°.

In a purely inductive circuit, how does the current relate to the voltage?

• • Current leads voltage by 90°.

• • Voltage leads current by 90°.

• • Current lags voltage by 90°.

• • They are in phase.

Which formula represents the inductive reactance?

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How does the current behave in a purely capacitive circuit?

• • Current and voltage are in phase.

• • Current leads voltage by 90°.

• • Current lags voltage by 90°.

• • Voltage lags current by 90°.

What does a phasor diagram visually represent?

• • DC circuit characteristics.

• • Time-domain signal properties.

• • Magnitude and phase relationships in AC circuits.

• • Digital signal processing.

Impedance in an AC circuit is made up of which components?

• • Only resistance.

• • Resistance and reactance.

• • Only reactance.

• • Capacitance only.

Which statement about the impedance triangle is true?

• • It shows the relationship between R, L, and C.

• • It shows the relationship between resistance (R), reactance (X), and impedance (Z).

• • It only shows resistive values.

• • It is used to calculate DC resistance.

What unit is used to express reactance?

• • Watts.

• • Volts.

• • Ohms.

• • Amps.

What does the angular frequency (ω) equal in terms of f?

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What is the equation for capacitive reactance?

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