Level 3 - A.C Theory Electrical Science Principles Formulae

State the formula for Inductive Reactance

• XL=2πf

• XL=2πfL

• XL=3πfL

What does 'f' stand for in the Inductive Reactance formula?

• Field

• Farads

• Frequency

What is frequency measured in?

• Hx

• Hs

• Hz

What does 'L' stand for in the Inductive Reactance formula?

• Inductance - measured in 'Henry's'

• Impedance - measured in 'Ohms'

• Inductance - measured in 'Farads'

Which of the following Engineering notation is correct for the Inductance of a coil given in mH?

• x10⁻³

• x10⁻⁶

• x10⁻⁹

Which of the following Engineering notation is correct for the Capacitance of a capacitor given in µF?

• x10⁻³

• x10⁻⁶

• x10⁻⁹

State the formula for Capacitive Reactance

• Xc=1/2πfC

• Xc=1/2πsC

• Xc=1/2πfH

What does 'C' stand for in the Capacitive Reactance formula?

• Charge - measured in 'Coulombs'

• Current - measured in 'Amps'

• Capacitance - measured in 'Farads'

What is Inductive Reactance 'XL' and Capacitive Reactance 'Xc' measured in?

• A - amps

• Ω - ohms

• Hz - hertz

What do we mean by Impedance? 'Z'

• Total current flow of a circuit - measured in Amps

• Conductivity

• Total resistance of a circuit - measured in Ohms