A Small Bulb Is Rated at 7

question 5

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) 1 350
• C) 2 080
• D) 4 530
• E) 5 630

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Definitions:

Teratogenic Drugs

Substances that can cause developmental malformations (birth defects) in an embryo or fetus when a pregnant woman is exposed to them.

Pregnant Women

Women who are in the state of carrying a developing fetus within their body.

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An antihistamine medication used to relieve symptoms of allergy, hay fever, and the common cold, as well as for sedation and to treat motion sickness.

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A condition characterized by a lack of adequate saliva production, leading to discomfort and potential oral health issues.