Select the best answer to complete the statement, and place...

Name: Problem 11, Chapter 17: Electricity 1: Devices, Circuits and Materials
Uploaded: 2021-03-13T14:46:05-08:00
Duration: 2 min 11 s
Channel: Vishal Gupta
Description: Select the best answer to complete the statement, and place the letter of the answer in the space provided. When a tungsten filament lamp is turned on, the current through the switch is initially a. low, but builds up. b. very high. c. moderate. d. dependent on the switch resistance. e. steady.

Select the best answer to complete the statement, and place the letter of the answer in the space provided. When a tungsten filament lamp is turned on, the current through the switch is initially a. low, but builds up. b. very high. c. moderate. d. dependent on the switch resistance. e. steady.

Select the best answer to complete the statement, and place the letter of the answer in the space provided.
When a tungsten filament lamp is turned on, the current through the switch is initially
a. low, but builds up.
b. very high.
c. moderate.
d. dependent on the switch resistance.
e. steady.

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Key Concepts

Ohm’s Law

Ohm's Law is a fundamental principle in electrical circuits, relating voltage, current, and resistance (V = IR). This law explains how, for a given voltage, a lower initial resistance in a tungsten lamp results in a higher initial current draw when the lamp is turned on.

Temperature-Dependent Resistance

Many materials, including tungsten, exhibit a change in resistance as their temperature changes. For tungsten filaments, the resistance is much lower when the filament is cold, resulting in a substantial increase in current when the lamp is first turned on. As the filament heats up, its resistance increases, stabilizing the current at a lower level.

Inrush Current

Inrush current refers to the initial surge of current that flows when an electrical device is first energized. This surge occurs because the device, such as a tungsten filament lamp, has a low resistance when cold. Over time, as the filament heats up and its resistance rises, the current decreases to its steady operational value.

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