Contents
- 1 What happen when AC passes through pure inductor?
- 2 What is AC through inductor?
- 3 When AC passes through a pure conductor?
- 4 When AC flows through an pure inductance then the current?
- 5 How is an AC inductance related to an inductive reactance?
- 6 When does an AC inductance reach its maximum positive value?
What happen when AC passes through pure inductor?
When a current passes through an inductive coil, the rate of change of the AC current induces an emf in the same coil that counteracts the changing current.
What is AC through inductor?
Hence, when a sinusoidal voltage is applied to an inductor, the voltage leads the current by one-fourth of a cycle, or by a 90º phase angle. Current lags behind voltage, since inductors oppose change in current. Changing current induces an emf. This is considered an effective resistance of the inductor to AC.
What is a purely inductive AC circuit?
The circuit which contains only inductance (L) and not any other quantities like resistance and capacitance in the circuit is called a Pure inductive circuit. In this type of circuit, the current lags behind the voltage by an angle of 90 degrees.
When AC passes through a pure conductor?
When a.c. passes through pure inductor then e.m.f. leads the current by π/2. Learn more: if a voltage across a bulb is 220 volt and current flowing through it 37.
When AC flows through an pure inductance then the current?
In a purely inductive circuit (an AC circuit containing inductance only) the current lags behind the voltage by 2π.
How are inductive circuits used in an AC circuit?
AC Inductive Circuits. 1 AC Applied Across a Pure Inductor. A pure inductor has no resistance in the coil winding but has only inductance. This property of inductance is 2 Inductive Reactance. 3 Power and Power Factor in Inductive AC Circuit. 4 Series RL Circuit.
AC Inductance with a Sinusoidal Supply. This simple circuit above consists of a pure inductance of L Henries ( H ), connected across a sinusoidal voltage given by the expression: V(t) = V max sin ωt. When the switch is closed this sinusoidal voltage will cause a current to flow and rise from zero to its maximum value.
When does an AC inductance reach its maximum positive value?
AC Inductance with a Sinusoidal Supply. The applied voltage reaches its maximum positive value a quarter ( 1/4ƒ ) of a cycle earlier than the current reaches its maximum positive value, in other words, a voltage applied to a purely inductive circuit “LEADS” the current by a quarter of a cycle or 90 o as shown below.
How does Lenz’s law work in an AC inductive circuit?
AC Inductive Circuits. According to the Lenz’s law, this emf opposes the change in the current. Therefore, the applied voltage has to overcome this back emf only, because there is no resistance in the circuit. Thus, the applied voltage and back emf are should be equal and opposite to keep the current flowing through the circuit.