What is the effect of increasing resistance in a series RLC circuit at resonance
Practice Questions
Q1
What is the effect of increasing resistance in a series RLC circuit at resonance? (2023)
Increases current
Decreases current
No effect on current
Increases voltage
Questions & Step-by-Step Solutions
What is the effect of increasing resistance in a series RLC circuit at resonance? (2023)
Step 1: Understand what a series RLC circuit is. It consists of a resistor (R), inductor (L), and capacitor (C) connected in a single loop.
Step 2: Know what resonance means in this context. Resonance occurs when the inductive reactance (XL) and capacitive reactance (XC) are equal, causing the circuit to have maximum current.
Step 3: Recognize that at resonance, the total impedance (Z) of the circuit is mainly determined by the resistance (R) because XL and XC cancel each other out.
Step 4: Realize that impedance is the total opposition to current flow in the circuit. If resistance increases, the total impedance also increases.
Step 5: Understand that according to Ohm's Law (V = I * Z), if impedance (Z) increases while the voltage (V) remains constant, the current (I) must decrease.
Step 6: Conclude that increasing resistance in a series RLC circuit at resonance leads to a decrease in current due to the increase in impedance.
