Quiz on Reactance in Electrical Engineering

What does reactance describe in electrical engineering?

• The opposition a circuit element presents to alternating current (AC)

• The flow of direct current (DC) through a circuit

• The resistance of a circuit to both AC and DC

• The voltage drop across a resistor

Which of the following is affected by reactance?

• Alternating current (AC) only

• Direct current (DC) only

• Both AC and DC

• Neither AC nor DC

What is the unit of reactance?

• Ohm (Ω)

• Volt (V)

• Ampere (A)

• Farad (F)

What is the formula for inductive reactance (XL)?

• XL = 2πfL

• XL = f/2πL

• XL = 2πL/f

• XL = fL/2π

In the formula for inductive reactance, what does 'f' represent?

• Frequency in hertz (Hz)

• Inductance in henries (H)

• Current in amperes (A)

• Voltage in volts (V)

What happens to inductive reactance as frequency increases?

• It increases

• It decreases

• It remains constant

• It becomes zero

In the context of inductive reactance, what does 'L' stand for?

• Inductance in henries (H)

• Length in meters (m)

• Load in kilograms (kg)

• Light intensity in lumens (lm)

What does capacitive reactance (XC) do in an AC circuit?

• Increases the current flow

• Opposes the change of voltage

• Decreases the resistance

• Increases the frequency

What is the formula for capacitive reactance (XC)?

• XC = 2πfC

• XC = 1/(2πfC)

• XC = f/(2πC)

• XC = 1/(fC)

In the formula for capacitive reactance, what does 'f' represent?

• Capacitance in farads

• Frequency in hertz

• Voltage in volts

• Resistance in ohms