Introduction to AC circuits

The form factor of a sinusoidal waveform is the ratio of

• RMS value to average value

• Peak value to RMS value

• Average value to RMS value

• Peak value to average value

The peak factor of a sinusoidal waveform is the ratio of

• RMS value to average value

• Peak value to RMS value

• Average value to RMS value

• Peak value to average value

What is the form factor of a sinusoidal waveform?

• 1.11

• 0.707

• 1.414

• 1.5

What is the formula for calculating the RMS value of a sinusoidal waveform?

• Peak Value x 2

• Peak Value x √2

• Peak Value / √2

• Peak Value x 1.11

What is the peak value of a sinusoidal voltage if its RMS value is 100 V?

• 141.4 V

• 70.7 V

• 100 V

• 200 V

What is the impedance of a pure resistive AC circuit?

• Equal to the resistance

• Equal to the reactance

• Equal to the inductance

• Equal to the capacitance

In a purely inductive AC circuit, the current

• Is in phase with the voltage

• Lags the voltage by 90 degrees

• Leads the voltage by 90 degrees

• None of the above

In a purely resistive AC circuit, the current

• Is in phase with the voltage

• Lags the voltage by 90 degrees

• Leads the voltage by 90 degrees

• None of the above

In a purely capacitive AC circuit, the current

• Is in phase with the voltage

• Lags the voltage by 90 degrees

• Leads the voltage by 90 degrees

• None of the above

What is the power factor of a pure inductive circuit?

• Zero

• One

• Leading

• Lagging