Induction and Transformer Concepts

What is mutual induction?

• When two coils are connected in series to increase voltage

• When a magnetic field is created by a permanent magnet near a coil

• When the growing and collapsing magnetic field from one coil passes through another coil, inducing an electromotive force (emf) across the second coil

• When a coil is short-circuited to increase current flow

What is the unit of capacitance?

• Ohm

• Farad

• Henry

• Tesla

What is the formula for capacitive reactance?

• XC​=2πfC1​

• XC​=2πfC

• XC​=2πfL1​

• XC​=2πfL

In an RLC circuit, what is the resonant frequency?

• f=2πLC​1​

• f=2πRC​1​

• f=2πRL​1​

• f=2πL/C​1​

What is the phase angle in an RLC circuit at resonance?

• 0 degrees

• 45 degrees

• 90 degrees

• 180 degrees

What is the voltage across the capacitor in a series RLC circuit at resonance?

• Equal to the supply voltage

• Zero

• Maximum

• Minimum

What is the quality factor (Q) of an RLC circuit?

• Q=L/C​R​

• Q=RL/C​​

• Q=C/L​R​

• Q=RC/L​​

In a parallel RLC circuit, at resonance, the impedance is:

• Maximum

• Minimum

• Zero

• Infinite

Which component in an RLC circuit stores energy in the form of a magnetic field?

• Resistor

• Capacitor

• Inductor

• Transformer

What is the unit of inductive reactance?

• Ohm

• Farad

• Henry

• Tesla