What describes a sourcing input or output?

• A. A sourcing input consumes current from the load.
• B. A sourcing input provides the voltage source for the load.
• C. A sourcing input ensures grounding.
• D. A sourcing input is used for clock synchronization.

Answer: (B)

The idea being tested is how a sourcing terminal behaves: it provides power to the load rather than drawing power from it. A sourcing input or output acts as the voltage source for the circuit it drives, delivering the necessary voltage (and current) to the load within the source’s capabilities. That’s why describing it as providing the voltage source for the load fits.

The other ideas describe different roles: consuming current from the load would mean the device sinks current, not sources it; grounding is about establishing a return reference or safety path, not power provisioning; clock synchronization is about timing signals, which is unrelated to sourcing power.