# Voltages in a Series RLC Circuit mcqs

### 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

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

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

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

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

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

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

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

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

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

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

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

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

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