The Voltmeter that converts the Unknown voltage to current Which is later amplified and read out is?

The question is from Analytical Chemistry/Physics and electrochemistry.

The question read:

The Voltmeter that converts the Unknown voltage to current Which is later amplified and read out is?

The Options are:

A. Potentiometer

B. pH meter.

C. Ammeter

D. Galvanometer

PH meter is an analytical instrument also called Voltmeter.

Is an instrument that converts unknown voltage to current, which is later amplified and read out.

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So the answer is C. pH Meter

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