ETC EngineeringMCQs
Home › Network Theory › A series RL circuit with R = 20 ohm and L = 4 H is connected to a DC source. Its time constant is?
MCQ Practice Question
Network TheoryTransient Analysis

A series RL circuit with R = 20 ohm and L = 4 H is connected to a DC source. Its time constant is?

  • A0.05 s
  • B0.2 s
  • C5 s
  • D80 s
Report an error
Correct Answer: B. 0.2 s
Explanation: For a series RL circuit, tau=L/R=4/20=0.2 s.
Reference: Standard network theory: transient analysis
Continue practicing: Network Theory MCQs or browse all MCQs.