In an a.c. circuit, a resistance ' R ' is connected in series with an inductance ' L '. If phase angle between voltage and current is 45^ , the value of inductive reactance will be ( 45^ =1 )

Step-by-step solution

In a series RL circuit, the phase angle satisfies = X_L R . Given = 45^ and 45^ = 1 , it follows that 1 = X_L R . Multiplying both sides by R yields X_L = R , indicating the inductive reactance equals the resistance. Final answer: A