If L is the inductance and R is the resistance then the SI unit of L R is

Step-by-step solution

SI Unit of L R The SI unit of resistance R is derived from Ohm's law, R = V I , giving Volts per Ampere. Inductance L is defined by V = L dI dt , so L = V dI/dt . Since the unit of dI dt is Amperes per second, the unit of L is Volt-seconds per Ampere. Thus, L R = ( V s / A ) ( V / A ) = s . This time constant = L R has SI unit second, confirming the dimensional consistency. Final answer: A (Note: The answer should be "second", but the provided box states A, which may be a typographical error; the correct unit is se