What does a dummy load consist of?

What does a dummy load consist of?

• A. A capacitor mounted on a heat sink
• B. A non-inductive resistor mounted on a heat sink
• C. An inductor wrapped in aluminum foil
• D. A transformer with multiple coils

Answer: (B)

A dummy load consists of a non-inductive resistor mounted on a heat sink because it is designed to simulate an actual load for a radio transmitter while dissipating power in the form of heat. This allows operators to test and adjust their equipment without radiating signals into the air, which is important for ensuring that transmitters function correctly and to prevent interference with other communications. Using a non-inductive resistor is crucial because it minimizes the effects of reactance, ensuring that the load seen by the transmitter is purely resistive. This helps in accurately representing the operating conditions the transmitter will experience when connected to an actual antenna. The heat sink is necessary for dissipating the heat generated by the resistor during operation, preventing damage to the components. Other options presented do not serve the purpose of a dummy load effectively. For instance, a capacitor or inductor could introduce additional reactance, which would not accurately simulate a true load, and a transformer isn’t suitable as it serves a different function in the circuit.

A dummy load consists of a non-inductive resistor mounted on a heat sink because it is designed to simulate an actual load for a radio transmitter while dissipating power in the form of heat. This allows operators to test and adjust their equipment without radiating signals into the air, which is important for ensuring that transmitters function correctly and to prevent interference with other communications.

Using a non-inductive resistor is crucial because it minimizes the effects of reactance, ensuring that the load seen by the transmitter is purely resistive. This helps in accurately representing the operating conditions the transmitter will experience when connected to an actual antenna. The heat sink is necessary for dissipating the heat generated by the resistor during operation, preventing damage to the components.

Other options presented do not serve the purpose of a dummy load effectively. For instance, a capacitor or inductor could introduce additional reactance, which would not accurately simulate a true load, and a transformer isn’t suitable as it serves a different function in the circuit.