A Small Bulb Is Rated at 7

question 6

Multiple Choice

A small bulb is rated at 7.50 W when operated at 125 V. The tungsten filament has a temperature coefficient of resistivity α = 4.50 × 10⁻³ / °C. When the filament is hot and glowing, its temperature is seven times room temperature (20 °C) . What is the resistance of the filament (in ohms) at room temperature?

• A)234
• B)1350
• C)2080
• D)4530
• E)5630

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Definitions:

Utility-Maximizing

The principle that consumers will allocate their income in a way that maximizes their overall satisfaction or utility.

Investment Portfolio

An assortment of financial assets such as equities, bonds, raw materials, as well as liquid assets including mutual funds and exchange-traded funds (ETFs).

Indifference Curves

Graphical representations used in microeconomics to show combinations of two goods that provide a consumer with the same level of satisfaction.

Standard Deviation

A statistical measure of the dispersion or variability in a set of data points or distributions.