What can cause the voltage across reactances in series to be larger than the voltage applied to them?

What is resonance in an electrical circuit?

- The highest frequency that will pass current
- The lowest frequency that will pass current
- The frequency at which the capacitive reactance equals the inductive reactance
- The frequency at which the reactive impedance equals the resistive impedance

What is the magnitude of the impedance of a series RLC circuit at resonance?

- High, as compared to the circuit resistance
- Approximately equal to capacitive reactance
- Approximately equal to inductive reactance
- Approximately equal to circuit resistance

What is the magnitude of the impedance of a circuit with a resistor, an inductor and a capacitor all in parallel, at resonance?

- Approximately equal to circuit resistance
- Approximately equal to inductive reactance
- Low, as compared to the circuit resistance
- Approximately equal to capacitive reactance

What is the magnitude of the current at the input of a series RLC circuit as the frequency goes through resonance?

What is the magnitude of the circulating current within the components of a parallel LC circuit at resonance?

- It is at a minimum
- It is at a maximum
- It equals 1 divided by the quantity 2 times Pi, multiplied by the square root of inductance L multiplied by capacitance C
- It equals 2 multiplied by Pi, multiplied by frequency, multiplied by inductance

What is the magnitude of the current at the input of a parallel RLC circuit at resonance?

What is the phase relationship between the current through and the voltage across a series resonant circuit at resonance?

- The voltage leads the current by 90 degrees
- The current leads the voltage by 90 degrees
- The voltage and current are in phase
- The voltage and current are 180 degrees out of phase

How is the Q of an RLC parallel resonant circuit calculated?

- Reactance of either the inductance or capacitance divided by the resistance
- Reactance of either the inductance or capacitance multiplied by the resistance
- Resistance divided by the reactance of either the inductance or capacitance
- Reactance of the inductance multiplied by the reactance of the capacitance

How is the Q of an RLC series resonant circuit calculated?

- Reactance of either the inductance or capacitance divided by the resistance
- Reactance of either the inductance or capacitance times the resistance
- Resistance divided by the reactance of either the inductance or capacitance
- Reactance of the inductance times the reactance of the capacitance

What is the half-power bandwidth of a parallel resonant circuit that has a resonant frequency of 7.1 MHz and a Q of 150?

What is the half-power bandwidth of a parallel resonant circuit that has a resonant frequency of 3.7 MHz and a Q of 118?

What is an effect of increasing Q in a resonant circuit?

- Fewer components are needed for the same performance
- Parasitic effects are minimized
- Internal voltages and circulating currents increase
- Phase shift can become uncontrolled

What is the resonant frequency of a series RLC circuit if R is 22 ohms, L is 50 microhenrys and C is 40 picofarads?

Which of the following can increase Q for inductors and capacitors?

What is the resonant frequency of a parallel RLC circuit if R is 33 ohms, L is 50 microhenrys and C is 10 picofarads?

What is the result of increasing the Q of an impedance-matching circuit?