Explain with neat sketch, the working of full wave rectifier voltmeter.
Full Wave Rectifier Type Voltmeter:
Working of full wave rectifier type A. C. Voltmeter Referring to the circuit diagram, for rectification, a full wave bridge circuit (ABCD) is used. Input is given across A and B in series with RS (multiplier). Ultimately d.c. is available as output voltage from points C and D to which PMMC meter is connected.
Now the current passing through meter is given as,
which causes full scale deflection of the meter.