Voltages in a Series RLC Circuit mcqs in basic electrical engineering.
In a series RLC circuit, the voltage across the resistor is in phase with:
a) The current
b) The voltage across the inductor
c) The voltage across the capacitor
d) The total applied voltage
Answer: a) The current
Explanation: In a series RLC circuit, the voltage across the resistor is in phase with the current flowing through the circuit.
The voltage across the inductor in a seres RLC circuit lags the current by:
a) 0 degrees
b) 45 degrees
c) 90 degrees
d) 180 degrees
Answer: c) 90 degrees
Explanation: The voltage across the inductor in a series RLC circuit lags the current by 90 degrees.
The voltage across the capacitor in a series RLC circuit leads the current by:
a) 0 degrees
b) 45 degrees
c) 90 degrees
d) 180 degrees
Answer: c) 90 degrees
Explanation: The voltage across the capacitor in a series RLC circuit leads the current by 90 degrees.
The sum of the voltages across the resistor, inductor, and capacitor in a series RLC circuit is equal to:
a) The total applied voltage
b) Zero
c) The current
d) The impedance
Answer: a) The total applied voltage
When the frequency of the applied voltage in a series RLC circuit is below the resonant frequency, the voltage across the capacitor is :
a) Larger than the voltage across the resistor
b) Smaller than the voltage across the resistor
c) Equal to the voltage across the resistor
d) Zero
Answer: a) Larger than the voltage across the resistor
When the frequency of the applied voltage in a series RLC circuit s above the resonant frequency, the voltage across the inductor is:
a) Larger than the voltage across the resistor
b) Smaller than the voltage across the resistor
c) Equal to the voltage across the resistor
d) Zero
Answer: a) Larger than the voltage across the resistor
Explanation: When the frequency is above the resonant frequency, the inductor behaves like an open circuit, causing a larger voltage drop across it compared to the resistor.
The voltage across the resistor in a series RLC circuit represents:
a) The active power
b) The reactive power
c) The apparent power
d) The total power
Answer: a) The active power
Explanation: The voltage across the resistor in a series RLC circuit represents the active power dissipated in the form of heat.
The voltage across the inductor in a series RLC circuit represents:
a) The reactive power
b) The active power
c) The apparent power
d) The total power
Answer: a) The reactive power
Explanation: The voltage across the inductor in a series RLC circuit represents the reactive power associated with the magnetic field.
The voltage across the capacitor in a series RLC circuit represents:
a) The reactive power
b) The active power
c) The apparent power
d) The total power
Answer: a) The reactive power
Explanation: The voltage across the capacitor in a series RLC circuit represents the reactive power associated with the electric field.
The phase angle between the voltage across the resistor and the current in a series RLC circuit is:
a) 0 degrees
b) 45 degrees
c) 90 degrees
d) 180 degrees
Answer: a) 0 degrees
Explanation: The voltage across the resistor in a series RLC circuit is in phase with the current.
The phase angle between the voltage across the inductor and the current in a series RLC circuit is:
a) 0 degrees
b) 45 degrees
c) 90 degrees
d) 180 degrees
Answer: b) 45 degrees
Explanation: The voltage across the inductor in a series RLC circuit lags the current by 45 degrees.
The phase angle between the voltage across the capacitor and the current in a series RLC circuit is:
a) 0 degrees
b) 45 degrees
c) 90 degrees
d) 180 degrees
Answer: c) 90 degrees
Explanation: The voltage across the capacitor in a series RLC circuit leads the current by 90 degrees.
The voltage across the resistor in a series RLC circuit is affected by:
a) Resistance only
b) Inductance only
c) Capacitance only
d) Resistance, inductance, and capacitance
Answer: d) Resistance, inductance, and capacitance
Explanation: The voltage across the resistor in a series RLC circuit is influenced by all three components: resistance, inductance, and capacitance.
When the resistance in a series RLC circuit is increased, the voltage across the resistor:
a) Increases
b) Decreases
c) Remains the same
d) Cannot be determined
Answer: a) Increases
When the inductance in a series RLC circuit is increased , the voltage across the inductor:
a) Increases
b) Decreases
c) Remains the same
d) Cannot be determined
Answer: a) Increases
When the capacitance in a series RLC circuit is increased, the voltage across the capacitor:
a) Increases
b) Decreases
c) Remains the same
d) Cannot be determined
Answer: a) Increases
The voltage across the resistor, inductor, and capacitor in a series RLC circuit can be calculated using:
a) Ohm’s Law
b) Kirchhoff’s Voltage Law
c) Kirchhoff’s Current Law
d) The power formula
Answer: b) Kirchhoff’s Voltage Law
The voltage across the resistor, inductor, and capacitor in a series RLC circuit depends on the:
a) Frequency of the applied voltage
b) Voltage source
c) Power factor
d) Amplitude of the current
Answer: a) Frequency of the applied voltage
The voltage across the resistor, inductor, and capacitor in a series RLC circuit is maximum at:
a) Resonance
b) Lower frequencies
c) Higher frequencies
d) It remains constant regardless of the frequency
Answer: a) Resonance
Explanation: The voltage across the resistor, inductor, and capacitor in a series RLC circuit is maximum at the resonant frequency
The voltage across the resistor in a series RLC circuit represents:
a) Real power
b) Reactive power
c) Apparent power
d) Total power
Answer: a) Real power
Explanation: The voltage across the resistor in a series RLC circuit represents the real power dissipated in the circuit.