Capacitive Reactance and Frequency Effects

The video tutorial explores capacitive reactance in AC theory, comparing it to inductive reactance. It demonstrates how frequency and capacitance changes affect current flow in a purely capacitive circuit. The tutorial explains the mathematical formula for capacitive reactance, emphasizing the inverse relationship between frequency, capacitance, and opposition to current flow. Key concepts include the setup of a simple circuit, the use of a multimeter, and the application of Ohm's law. The video concludes with a recap of the relationships and formula discussed.

What is the main focus of the video in relation to AC theory?

• Inductive reactance

• Capacitive reactance

• Voltage regulation

• Resistive circuits

What is the value of the capacitor used in the initial circuit setup?

• 1 microfarad

• 10 picofarads

• 470 nanofarads

• 1 nanofarad

How does increasing the frequency affect the current in a purely capacitive circuit?

• It decreases the current

• It has no effect on the current

• It stabilizes the current

• It increases the current

What happens to the opposition to current flow when the frequency is increased in a capacitive circuit?

• It increases

• It decreases

• It remains constant

• It fluctuates

What is the effect of increasing capacitance on the opposition to current flow?

• It doubles the opposition

• It increases the opposition

• It decreases the opposition

• It has no effect

What is the new current when a 470 nanofarad capacitor is used?

• 0.5 milliamps

• 0.06 milliamps

• 1.38 milliamps

• 2.91 milliamps

What is the formula for capacitive reactance?

• XC = 2πFL

• XC = 1/(2πFL)

• XC = 1/(2πFC)

• XC = 2πFC

In the formula XC = 1/(2πFC), what does 'F' represent?

• Frequency

• Force

• Farad

• Flux

What unit is used to measure capacitive reactance?

• Ohms

• Amperes

• Hertz

• Farads

What happens to the capacitive reactance when the frequency is increased?

• It doubles

• It decreases

• It increases

• It remains the same