Welcome to the article Resonance can occur when the frequency of an AC circuit and the length of the circuit are in tune A True B False. On this page, you will learn the essential and logical steps to better understand the topic being discussed. We hope the information provided helps you gain valuable insights and is easy to follow. Let’s begin the discussion!
Answer :
Final answer:
Resonance in an AC electrical circuit occurs when the driving frequency equals the circuit's natural frequency, which leads to maximum current oscillations. This principle is utilized in radio receivers to tune into specific broadcast frequencies, often with the help of variable capacitors. So the option number B is correct.
Explanation:
Resonance occurs in AC electrical circuits and is a significant principle in the function of various systems, notably in receiving radio signals. Resonance happens when a system is driven with a frequency equivalent to its natural frequency, resulting in the greatest amplitude oscillations within the system, such as in an RLC circuit.
One common application of this is in radio receivers, wherein adjusting the circuit parameters, such as the capacitive and inductive elements, sets the resonant frequency to match the desired radio station's broadcast frequency. At this resonant frequency, the circuit will have a significantly higher current flow, effectively amplifying the signal of that frequency while damping out others.
Variable capacitors are often used for fine-tuning the resonance frequency, thereby allowing the radio to receive a specific station and reject others. This selectivity is determined by the 'Q factor' of the circuit, where a high Q indicates sharp resonance at a specific frequency, and a low Q indicates a wider range of resonance frequencies.
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Rewritten by : Brahmana