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Chapter 20: Q32P (page 527)

Explain how the difference voltage in Figure 20-37 reduces noise from source flicker.

Short Answer

Expert verified

The differential voltage minimises noise from source flicker.

Step by step solution

01

Definition of voltage

The rate at which energy, electricity, or electromagnetic forces are taken from a source is referred to as voltage.

02

Determine the difference voltage reduces noise from source flicker

  • It must be described how the differential voltage decreases noise from source flicker.
  • Due to the same light intensity spirits to each chamber, the sample and reference are identical. This is because the voltage difference is ideally close to zero.
  • When compared to the more usual carbon composition type, flicker noise can be greatly reduced by utilising wire-wound or metallic film resistors.
  • Sample absorption and observer noise from source flicker cause the voltage difference.
  • It was taught how the differential voltage minimises noise from source flicker.

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Most popular questions from this chapter

In Figure 20-35, the relative detection limit is 37 after 1sof signal averaging, 12.5 after 10s, and 5.6 after 40 sof signal averaging. Based on the value of 37 at 1 s, what are the expected detection limits at 10 sand 40 sin an ideal experiment?

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