the opposition thata coil affers to the of alternating current is called
The opposition that a coil offers to the flow of alternating current is called inductive reactance. Inductive reactance represents the resistance to the change in current flow caused by the inductance of the coil. In order to calculate the inductive reactance, you need to know the value of the inductance (usually denoted by L) of the coil and the frequency (usually denoted by f) of the alternating current. The formula to calculate the inductive reactance is:
XL = 2πfL
Where:
XL is the inductive reactance
π is a mathematical constant (approximately 3.14159)
f is the frequency of the alternating current in hertz (Hz)
L is the inductance of the coil in henries (H)
Once you have the values of L and f, you can use this formula to calculate the inductive reactance. The unit of inductive reactance is ohms (Ω), which is the same unit for resistance.