Why can galvanometer measure AC current?
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A galvanometer as such cannot be used to measure the current in a circuit due to following reasons:
(i) Galvanometer is quite a sensitive device. It shows full scale deflection with a current of few microampere, hence may get damaged if strong current is passed through it.
(ii) While measuring current, the galvanometer whose resistance is large than ammeter has to be connected in series of the circuit. Due to it, there will be decrease in current of the circuit. Thus, measurement of current will not be true.
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