In a parallel RLC circuit, what happens to the total current if the frequency is increased?
Practice Questions
1 question
Q1
In a parallel RLC circuit, what happens to the total current if the frequency is increased?
Increases
Decreases
Remains the same
Depends on R
In a parallel RLC circuit, increasing frequency generally increases the total current due to lower reactance.
Questions & Step-by-step Solutions
1 item
Q
Q: In a parallel RLC circuit, what happens to the total current if the frequency is increased?
Solution: In a parallel RLC circuit, increasing frequency generally increases the total current due to lower reactance.
Steps: 7
Step 1: Understand what a parallel RLC circuit is. It consists of a resistor (R), inductor (L), and capacitor (C) connected in parallel.
Step 2: Know that in a circuit, current can be affected by frequency. Frequency is how fast the current changes direction.
Step 3: Recognize that each component (R, L, C) has a property called reactance, which opposes the flow of current. Inductors have inductive reactance (XL) and capacitors have capacitive reactance (XC).
Step 4: Learn that inductive reactance increases with frequency (XL = 2πfL) and capacitive reactance decreases with frequency (XC = 1/(2πfC)).
Step 5: When frequency increases, the inductive reactance (XL) becomes larger, but the capacitive reactance (XC) becomes smaller.
Step 6: In a parallel circuit, the total current is the sum of the currents through each component. As frequency increases, the current through the capacitor increases more than the current through the inductor decreases.
Step 7: Therefore, the total current in the circuit increases when the frequency is increased.
