A Resistor Develops Heat at the Rate of 20 W

question 57

Multiple Choice

A resistor develops heat at the rate of 20 W when the potential difference across its ends is 30 V. The resistance of the resistor is approximately

• A) 45 Ω.
• B) 5.5 Ω.
• C) 30 Ω.
• D) 1.5 Ω.
• E) 2 Ω.

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Definitions:

Productive Efficiency

A situation in which an economy or entity is producing goods and services at the lowest possible cost, utilizing all its resources efficiently.

Allocative Efficiency

A state of resource allocation where goods and services are distributed according to consumer preferences, with each good produced up to the point where the last unit provides a level of utility equal to its cost of production.

Productive Efficiency

A situation where goods and services are produced at the lowest possible cost and resources are utilized optimally.