Terminology clarity — “load resistance”: Evaluate the statement: “A load resistance is the resistance of the load.”

Difficulty: Easy

Correct Answer: Correct

Explanation:


Introduction / Context:
Electronics relies on shared vocabulary. The term “load” refers to the device or network that consumes power from a source. Understanding that “load resistance” is simply the equivalent resistance presented by that load helps with circuit analysis, voltage divider design, and matching considerations.


Given Data / Assumptions:

  • We use the word “load” in its standard circuit sense.
  • We consider both DC and AC contexts but focus on the resistance concept.
  • If the load is not purely resistive, an equivalent resistance or impedance may be used depending on frequency.


Concept / Approach:
For resistive loads, the load can be modeled by a single resistance R_load. For complex loads in AC, the generalized quantity is impedance Z_load, which includes resistance and reactance. When someone says “load resistance,” they either mean the pure resistive case or the resistive part of the impedance. In plain language, it is indeed the resistance of the load as “seen” by the source.


Step-by-Step Solution:

Define load: the element(s) drawing power from the source.Define load resistance: the equivalent resistance of that load under the operating condition.Note that in AC, we may instead speak of load impedance; resistance is the real component.Thus, the statement is an accurate plain-language definition.


Verification / Alternative check:
Basic circuit textbooks define R_load in divider equations such as V_out = V_in * (R_load / (R_source + R_load)), illustrating the use of “load resistance” as the resistance attributable to the load connection.


Why Other Options Are Wrong:

  • Incorrect: Contradicts standard terminology.
  • Only for AC/DC: The definition holds regardless of frequency; only the modeling approach changes.
  • Depends on power factor: Power factor relates to AC impedance angle, not the definition of resistance.


Common Pitfalls:
Mixing “resistance” and “impedance.” While related, impedance includes reactance; still, calling a purely resistive load’s opposition “load resistance” is fully correct.


Final Answer:
Correct

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