C) Bleeder Resistors

Bleeder resistors are widely used in voltage power supplies to safely discharge residual electrical energy stored in capacitors when the power supply is turned off. These resistors serve an important safety function by preventing the accumulation of high voltages that could pose a risk of electrical shock or damage to the circuit components.

1. What are Bleeder Resistors?

Bleeder resistors, also known as discharge resistors or bleeder loads, are high-value resistors connected across the output of a power supply. They provide a discharge path for the energy stored in capacitors, allowing them to discharge slowly and safely when the power supply is turned off. By dissipating the stored energy, the bleeder resistors prevent the capacitors from retaining a dangerous charge.

2. Purpose of Bleeder Resistors

The main purpose of bleeder resistors is to discharge the energy stored in capacitors to a safe level quickly. When a power supply is switched off, the capacitors connected to it may retain a significant amount of charge. Without bleeder resistors, this charge could persist for an extended period, posing a risk to technicians or anyone working with the circuit.

3. Working Principle

When the power supply is turned off, the bleeder resistors provide a discharge path for the capacitors' energy. The resistors are designed to have a high resistance value, which allows only a small amount of current to flow through them. This current slowly discharges the capacitors, reducing the voltage across them over time.

4. Importance of Bleeder Resistors

Bleeder resistors play a vital role in ensuring the safety of personnel and preventing damage to the power supply and associated components. They help eliminate the risk of electric shock by discharging the stored energy in a controlled manner. Additionally, by preventing the accumulation of high voltages, they protect the capacitors from potential damage that could impact the overall performance and lifespan of the power supply.

In conclusion, the correct answer is option C) Bleeder resistors. These resistors are used in voltage power supplies to discharge the energy stored in capacitors and prevent the accumulation of high voltages. They play a crucial role in ensuring the safety of personnel and protecting the circuit components from damage.