XL

• Explain briefly why XL limits the amount of alternating current.
• Explain why XL increases with higher frequencies and more inductance.  How might you use this fact in an application.

Inductive Circuits

• What characteristic of the current in an inductance determines the amount of induced voltage? State briefly why.
• Why is the voltage across a resistance in phase with the current through the resistance?

RC and L/R Time Constants

• Give an application in electronic circuits for an RC circuit with a long time constant and with a short time constant.
• Discuss why an arcing voltage could be a problem with coils used in switching circuits.

Power

• Compare real power and apparent power.
• Define power factor and discuss the topic of power factor correction.