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Which of the following is not an advantage of a photovoltaic cell which is used as a detector in Flame emission photometers?

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Which of the following is not an advantage of a photovoltaic cell which is used as a detector in Flame emission photometers?

(a) Portable

(b) No external supply

(c) Robust in construction

(d) Does not show fatigue

I got this question in unit test.

This intriguing question originated from Flame Emission Photometers topic in portion Colorimetry and Spectrometry of Analytical Instrumentation

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Right choice is (d) Does not show fatigue

To explain: It does show fatigue. It shows a decrease in response with continued illumination.

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