Time Constant - LR Circuit

The video tutorial covers the concept of time constants in LR circuits. It begins with a recap of previous lessons on deriving equations for current and its rate of change. The instructor explains the significance of the time constant, which is the time it takes for a 63.2% change in the variable. The video also includes a graphical interpretation of how current and its rate of change behave over time in an LR circuit. The tutorial concludes with a detailed discussion on the time constant's role in these graphs, emphasizing its importance in understanding circuit behavior.

What is the primary focus of the lesson on LR circuits?

• Deriving equations for voltage

• Understanding the time constant

• Calculating resistance

• Measuring inductance

In the context of LR circuits, what does the time constant represent?

• The time for a 50% change in current

• The time for a 75% change in resistance

• The time for a 63.2% change in the variable

• The time for a 100% change in voltage

How is the time constant mathematically expressed in an LR circuit?

• Voltage over current

• Inductance over resistance

• Resistance over inductance

• Current over voltage

What happens to the current in an LR circuit after one time constant has passed?

• It reaches 100% of its final value

• It reaches 63.2% of its final value

• It decreases to 0

• It remains unchanged

After one time constant, how does the time rate of change of current behave in an LR circuit?

• It remains constant

• It decreases by 63.2% from its initial value

• It increases to its maximum value

• It doubles