2. inductance ac mod

Multiple Choice

What is the significance of inductance in an a.c. circuit for electrical installations?

• It helps in storing electrical energy temporarily.

• It increases the resistance of the circuit.

• It decreases the voltage in the circuit.

• It is used to convert a.c. to d.c.

Multiple Choice

Which formula represents the inductive reactance in terms of frequency and inductance?

• X_L = V / I

• X_L = 2 π f L

• X_L = ω L

• X_L = I / V

Multiple Choice

How does increasing the frequency of the supply affect the current flowing through a purely inductive circuit, according to the graphs shown?

• The current increases as frequency increases.

• The current decreases as frequency increases.

• The current remains constant as frequency increases.

• The current fluctuates randomly with frequency.

Open Ended

Explain the phase relationship between voltage and current in a purely inductive circuit as shown in the waveform diagram.

Multiple Select

Select all statements that correctly describe the effect of increasing supply frequency on inductive reactance and current in a coil, based on the examples provided.

• Inductive reactance increases with frequency.

• Current decreases with frequency.

• Inductive reactance decreases with frequency.

• Current increases with frequency.

Open Ended

What questions do you still have about inductance in an a.c. circuit, or is there anything you would like to know more about?

Open Ended

Explain how inductance affects the current and voltage in an a.c. circuit based on the diagram shown.

Open Ended

Any questions?