Measurements and Instrumentation

Which of the following instruments can be used for dc as well ac upto a few MHz?

Moving iron instrument

Thermocouple instrument

Induction instrument

Moving coil instrument

Select the correct answer as per following codes

A 2 only

B 2 and 3 only

C 1, 2 and 3 only

D 2 and 4 only

ANS:A - 2 only

Thermocouple instrument is based on heating effect and can be used for very high frequencies also.

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