Understanding Capacitive Circuits in AC Systems

Which of the following is true about capacitors in AC circuits?

• They increase the current

• They decrease the current

• They have no effect on the current

• They store DC voltage.

Fill in the blank: The phase angle between the current and voltage in a purely capacitive AC circuit is ______ degrees.

• 0

• 45

• 90

• 180

In a capacitor, the two conducting plates are separated by a ______.

• Conductor

• Insulator

• Semiconductor

• Superconductor

The function of a capacitor is to ______.

• Store electrical energy

• Convert electrical energy

• Generate electrical energy

• Destroy electrical energy

Fill in the blank: In the formula X_C = 1/(2πfC), 'C' represents __.

• Capacitance in farads

• Frequency in Hz

• Reactance in ohms

• Resistance in ohms

In the impedance formula Z = √(R^2 + X_C^2), what does X_C represent?

• Total impedance

• Resistance

• Capacitive reactance

• Inductive reactance

Which of the following is a component of the impedance formula?

• Voltage

• Current

• Resistance

• Power

What is one of the real-world examples of capacitors?

• Power factor correction

• Power supply filtering

• Timing circuits

• Filter design