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Lesson: Reactance of Alternating-Current Circuits

Sample Question Videos

Worksheet • 8 Questions • 1 Video

Q1:

A 5.0-µF capacitor is in connected in an ac circuit.

Calculate the reactance of the capacitor for current with frequency of 60 Hz.

Calculate the reactance of the capacitor for current with frequency of 600 Hz.

Calculate the reactance of the capacitor for current with frequency of 6 0 0 0 Hz.

Q2:

A 20-mH inductor is connected across an ac source with a variable frequency and a constant-voltage amplitude of 9.0 V.

If the frequency of the ac source is fixed at 20 kHz, determine the reactance of the circuit.

  • A 2 . 5 × 1 0 3 Ω
  • B 3 . 7 × 1 0 3 Ω
  • C 1 . 3 × 1 0 3 Ω
  • D 2 . 9 × 1 0 3 Ω
  • E 1 . 9 × 1 0 3 Ω

If the frequency of the ac source is fixed at 20 kHz, determine the maximum current through the inductor.

  • A 3 . 6 × 1 0 3 A
  • B 5 . 9 × 1 0 3 A
  • C 1 . 9 × 1 0 3 A
  • D 4 . 5 × 1 0 3 A
  • E 2 . 6 × 1 0 3 A

If the frequency of the ac source is fixed at 60 Hz, determine the reactance of the circuit.

If the frequency of the ac source is fixed at 60 Hz, determine the maximum current through the inductor.

Q3:

An ac circuit contains an inductor and capacitor.

Find the reactance of a 2.0-mH inductor for a frequency of 60 Hz in the ac circuit.

Find the reactance of a 2.0-mH inductor for a frequency of 600 Hz in the ac circuit.

Find the reactance of a 20-mH inductor for a frequency of 6.0 Hz in the ac circuit.

Find the reactance of a 20-mH inductor for a frequency of 60 Hz in the ac circuit.

Find the reactance of a 2.0-mF capacitor for a frequency of 60 Hz in the ac circuit.

Find the reactance of a 2.0-mF capacitor for a frequency of 600 Hz in the ac circuit.

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