Measurements and Instrumentation - Engineering

Q1:

Assertion (A): Electrodynamic instrument is not used as ammeter or voltmeter. Reason (R): Electrodynamic instrument is more costly than PMMC and moving iron instrument.

A Both A and R are true and R is correct explanation of A

B Both A and R are true but R is not correct explanation of A

C A is true R is false

D A is false R is true

ANS:A - Both A and R are true and R is correct explanation of A

I think option D is correct because electrodynamics can be an ammeter and voltmeter.