Explain how an alternating current can be measured using a rectifier meter

Explain how an alternating current can be measured using a rectifier meter

When a.c is supplied to a rectifier meter, current flows in only one direction. Current flows in the half cycle for positive bias of the diode and in the next half cycle current flow is zero. The characteristics is shown below

 When the frequency is high, the ammeter reads a steady r.m.s value of the current.

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