Question

Explain the term inductive reactance.

Answer 1

Inductive reactance is the restriction to a changing current flow. The unit of impedance is ohms. Inductive reactance depends on two terms, i.e., frequency and the value of inductance. Inductive reactance is essentially small for lower frequencies and large for greater frequencies. It is negligible for steady DC.

Complete step-by-step solution:
An inductor is a coil of wire. When current flows through the coil, an electrical field is produced. The longer the coil or, the larger the number of turns, the bigger the field induced. It is termed "inductance." Inductive reactance is the reactance of that inductive element. With the help of an inductive component, electrical energy stores in the form of a magnetic field. When an alternating current passes through the circuit, the magnetic field is formed around it can be changed due to the current. Variations in the magnetic field can produce an electric current in the equivalent circuit. Lenz's law says that the induced current direction is opposite to the primary current. Hence, we can tell that the inductive reactance resists the change of current by the element. It is denoted by $X_{L}$ and it is equal to :
$X_{L} = 2 \pi f L$
Where f is the frequency.
L is the inductance of the inductor.
The value of reactance depends on the supply frequency. Inductive reactance directly depends on the frequency. As frequency increases, the value of inductive reactance also increases and vice versa. For the DC supply, the inductive reaction value will be zero as the Dc supply frequency is zero.
Additional Information: - In purely capacitive circuit, Capacitive reactance says that a capacitor is restricted to the flow of AC in the ac circuit. A capacitor resists the variations in the potential difference across its plates. Capacitive reactance is stated to be inversely proportional to the signal frequency and capacitance.

Note: The voltage increases with the rate-of-change of current rises. The rate-of-change of current increases with the frequency increases. The frequency of the voltage rises, then inductive reactance gains. The voltage drop across the inductor increments because the inductive reactance is a more significant portion of the circuit's total impedance.