Inductors fact check

What is the symbol for Inductance?

• I

• Z

• X_L

• L

What is the symbol for Inductive Reactance?

• L

• X_L

• X_C

• R

What is the formula for Inductive reactance?

• $XL\ =2\pi fL$

• $XL\ =\ \frac{1}{2\pi fL}$

• $XL\ =2\pi HC$

• $XL\ =V\pi fL$

As a general rule, inductors oppose change in________________

• Current

• resistance

• time

• power

Where current and voltage are in phase in an ac system, it would be regarded as purely resistive .

• True

• False

The unit of inductive reactance is the ohm.

• True

• False

The unit of inductance is the farad.

• True

• False

Does the current lead or lag the voltage in an inductor?

• Lead

• Lag

The opposition to current flow in a pure inductor is called the___________________

• Impedance

• Resistance

• Inductive Reactance

• phase angle

Tick all those which have an inductor (coil) in them.

• Fluorescent Lamp

• Motor

• Incandescent lamp

• LED

• Transformer