Understanding Capacitive Reactance

What is the primary function of capacitive reactance in a circuit?

• To increase current flow

• To oppose changes in voltage

• To store energy

• To decrease resistance

Which symbol is used to represent capacitive reactance?

• Z

• R

• X

• C

How is capacitive reactance calculated using frequency?

• X = 1 / (2πfC)

• X = f / (2πC)

• X = 1 / (fC)

• X = 2πfC

What is the angular velocity (Omega) in terms of frequency?

• Omega = T / 2π

• Omega = 2πf

• Omega = 2π / T

• Omega = f / 2π

What is the relationship between frequency and period?

• They are unrelated

• They are equal

• They are directly proportional

• They are inversely proportional

What happens to capacitive reactance as frequency increases?

• It increases

• It decreases

• It remains constant

• It becomes zero

If the frequency of a voltage source is decreased, how does it affect the capacitive reactance?

• The reactance decreases

• The reactance increases

• The reactance remains unchanged

• The reactance becomes zero

What is the effect of a very high frequency on a capacitor?

• It acts like an open circuit

• It acts like a short circuit

• It increases resistance

• It decreases capacitance

What is the unit of capacitive reactance?

• Ohms

• Volts

• Farads

• Hertz

What is the effect of a very low frequency on a capacitor?

• It acts like a short circuit

• It acts like an open circuit

• It increases current flow

• It decreases voltage