How Much Current Is Needed to Heat the Filament Enough

question 18

Multiple Choice

How much current is needed to heat the filament enough to produce a 100 to 1000 mA tube current?

• A) 1 A to 10 A
• B) 5 A to 7 A
• C) 1 mA to 10 mA
• D) 5 mA to 7 mA

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Definitions:

Normal Good

A good for which demand increases as consumer income rises, and decreases as consumer income falls.

Income Elasticity

A rephrased definition: The responsiveness of demand for an item to changes in the income of the people demanding the item.

Inferior Good

A good or service whose consumption declines as income rises, prices held constant.

Positive

Characterized by or denoting an effect, result, or attribute that is beneficial or conducive to growth or well-being.