In a parallel RLC circuit, what happens to the total current if the frequency is

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Question: In a parallel RLC circuit, what happens to the total current if the frequency is increased?

Options:

Correct Answer: Increases

Solution:

In a parallel RLC circuit, increasing frequency generally increases the total current due to lower reactance.

In a parallel RLC circuit, what happens to the total current if the frequency is increased?

In a parallel RLC circuit, what happens to the total current if the frequency is increased?

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.

Reactance – The opposition to alternating current (AC) flow in a circuit, which varies with frequency.
Impedance – The total opposition to current flow in an AC circuit, combining resistance and reactance.
Resonance – The frequency at which the inductive and capacitive reactances are equal, resulting in maximum current.