9.6 Check Your Understanding A strain gauge is an electrical device to measure strain, as shown below. It consists of a flexible, insulating backing that supports a conduction foil pattern. The resistance of the foil changes as the backing is stretched. How does the strain gauge resistance change? Is the strain gauge affected by temperature changes?

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**Chapter 9 | Current and Resistance**

### Significance
Notice that the resistance changes by more than a factor of 10 as the filament warms to high temperature and the current through the filament depends on the resistance of the filament and the voltage applied. If the filament is used in an incandescent light bulb, the initial current through the filament when the bulb is first energized will be higher than the current after the filament reaches the operating temperature.

### 9.6 Check Your Understanding
A strain gauge is an electrical device to measure strain, as shown below. It consists of a flexible, insulating backing that supports a conduction foil pattern. The resistance of the foil changes as the backing is stretched. How does the strain gauge resistance change? Is the strain gauge affected by temperature changes?

### Diagram Explanation
The image shows a strain gauge, which is a rectangular device with an orange backing and a zig-zag conduction foil pattern. Two terminal leads extend from the bottom, indicating points where electrical connections are made. The purpose of the strain gauge is to detect mechanical strain by converting small amounts of expansion or contraction into measurable changes in electrical resistance.
Transcribed Image Text:**Chapter 9 | Current and Resistance** ### Significance Notice that the resistance changes by more than a factor of 10 as the filament warms to high temperature and the current through the filament depends on the resistance of the filament and the voltage applied. If the filament is used in an incandescent light bulb, the initial current through the filament when the bulb is first energized will be higher than the current after the filament reaches the operating temperature. ### 9.6 Check Your Understanding A strain gauge is an electrical device to measure strain, as shown below. It consists of a flexible, insulating backing that supports a conduction foil pattern. The resistance of the foil changes as the backing is stretched. How does the strain gauge resistance change? Is the strain gauge affected by temperature changes? ### Diagram Explanation The image shows a strain gauge, which is a rectangular device with an orange backing and a zig-zag conduction foil pattern. Two terminal leads extend from the bottom, indicating points where electrical connections are made. The purpose of the strain gauge is to detect mechanical strain by converting small amounts of expansion or contraction into measurable changes in electrical resistance.
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