Inductive Reactance and AC Circuits

The lecture discusses inductive reactance, which is the resistance in an inductor due to induced EMF. It explains how voltage and current vary in an inductor connected to an AC source, using Kirchhoff's Loop Rule to derive the voltage equation. The phase difference between voltage and current is highlighted, and the concept of inductive reactance is defined mathematically, analogous to Ohm's Law. The lecture concludes by emphasizing the role of inductive reactance in impeding electron flow.

What is inductive reactance primarily caused by?

• The physical size of the inductor

• The induced EMF within the inductor

• The temperature of the circuit

• The type of material used in the inductor

In an AC circuit, how does the electric current in an inductor change over time?

• It increases linearly

• It remains constant

• It decreases exponentially

• It oscillates sinusoidally

What rule is applied to derive the voltage across an inductor?

• Faraday's Law

• Kirchhoff's Current Law

• Ohm's Law

• Kirchhoff's Loop Rule

What is the phase difference between voltage and current in an inductor?

• 45 degrees

• 0 degrees

• 180 degrees

• 90 degrees

How is the peak voltage across an inductor related to the peak current?

• It is equal to the peak current

• It is independent of the peak current

• It is inversely proportional to the peak current

• It is directly proportional to the peak current

What is the unit of inductive reactance?

• Henrys

• Ohms

• Amperes

• Volts

Which equation is analogous to Ohm's Law for defining inductive reactance?

• V = L * I

• V = I * R

• V = I * XL

• V = L * di/dt

What does inductive reactance impede in an inductor?

• The flow of heat

• The flow of light

• The flow of electrons

• The flow of magnetic fields

How is the angular frequency related to the frequency in the context of inductive reactance?

• Angular frequency is half the frequency

• Angular frequency is twice the frequency

• Angular frequency is the same as the frequency

• Angular frequency is 2π times the frequency

What is the significance of inductive reactance in an AC circuit?

• It provides resistance to current flow

• It increases the frequency

• It enhances the current flow

• It reduces the voltage