Q. The time constant of an $LR$ circuit represents the time in which the current in the circuit
A) Reaches a value equal to about 37% of its final value
B) Reaches a value equal to about 63% of its final value
C) Attains a constant value
D) Attains 50% of the constant value
Explanation
The correct answer is Option B: Reaches a value equal to about 63% of its final value.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.