Electrolysis Practice Exam

Which device typically helps in stabilizing voltage fluctuations in A.C. circuits?

1. Rectifier

2. Capacitor

3. Transformer

4. Oscillator

The correct answer is: Transformer

The device that typically helps in stabilizing voltage fluctuations in alternating current (A.C.) circuits is the transformer. Transformers function by transferring electrical energy between two or more circuits through electromagnetic induction. When voltage fluctuations occur in an A.C. circuit, a transformer can step up or step down the voltage levels, thereby helping to regulate power and reduce potential spikes or drops in voltage. This function is particularly important in power distribution, where maintaining a stable voltage level is crucial for the effective operation of electrical appliances and systems. By adjusting the voltage to the desired level, transformers play a vital role in ensuring that the electrical supply remains consistent, contributing to the overall stability of the A.C. circuit. In contrast, other devices such as rectifiers, capacitors, and oscillators serve different functions in electrical applications. Rectifiers convert A.C. to direct current (D.C.) and do not stabilize voltage in A.C. circuits. Capacitors can store and release electrical energy which may help to filter out voltage spikes but are not primarily designed for voltage stabilization. Oscillators generate signals and are used in different applications related to frequency rather than directly stabilizing voltage in A.C. circuits.