Inductive Reactance and AC Circuits

The video tutorial explains the concept of applying AC voltage to a coil, resulting in alternating current and inductive reactance. It covers the calculation of inductive reactance using frequency and inductance, and how frequency affects it. An example is provided to demonstrate the calculation of inductive reactance and the resulting current.

What happens to the direction of the alternating current when the frequency of the AC voltage changes?

• The direction remains constant.

• The direction changes with the frequency.

• The direction is unaffected by frequency.

• The direction changes randomly.

What is the term used to describe the complex non-ohmic resistance in a coil when AC voltage is applied?

• Capacitive reactance

• Ohmic resistance

• Resistive impedance

• Inductive reactance

How is inductive reactance calculated?

• X_L = L / (2 * pi * f)

• X_L = 2 * f * L

• X_L = f / (2 * pi * L)

• X_L = 2 * pi * f * L

What happens to the inductive reactance when the AC voltage frequency is very high?

• It becomes zero.

• It decreases.

• It remains constant.

• It becomes very high.

What is the effect on the coil when a DC voltage is applied?

• The coil has high reactance.

• The coil acts as an open circuit.

• The coil has low resistance.

• The coil acts as a short circuit.

In the given example, what is the inductive reactance when 230 volts is applied to a coil with 500 Millihenry inductance at 50 hertz?

• 157 Ohms

• 100 Ohms

• 50 Ohms

• 200 Ohms

How do you determine the rms current flowing through the coil in the example?

• By using the capacitive reactance

• By using the total impedance

• By using the inductive reactance

• By using the ohmic resistance R

What is the rms current flowing through the coil in the example provided?

• 0.5 amps

• 3.0 amps

• 1.5 amps

• 2.0 amps