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Author Question: A small bulb is rated at 7.50 W when operated at 125 V. The tungsten filament has a temperature ... (Read 99 times)

B

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on: Aug 6, 2020

Question 1

A small bulb is rated at 7.5 W when operated at 125 V. Its resistance (in ohms) is

◦
0.45.

◦
7.5.

◦
17.

◦
940.

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2 100.


Question 2

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?

◦
234

◦
1 350

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2 080

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4 530

◦
5 630
Physics for Scientists and Engineers ¦ Serway, Jewett ¦ 9th Edition
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Marked as best answer by B on Aug 6, 2020

shaikhs

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Reply #1 on: Aug 6, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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B

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Reply 2 on: Aug 6, 2020
Excellent

nyrave

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Reply 3 on: Yesterday
Gracias!

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