A PMMC instrument with FSD of 50 µA and Rm = 1700 N is used in the half wave rectifier voltmeter circuit shown in figure. The silicon diode (D1) must have a minimum (peak) forward current of 100 µA when the measured voltage is 20 % of FSD. The voltmeter is to indicate 50 Vrms at full scale. Calculate the values of R, and Rsh- R, \ISH IF Im Vm RSH D2 PMMC instrument

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1700 Ω is used
A PMMC instrument with FSD of 50 µA and Rm
in the half wave rectifier voltmeter circuit shown in figure. The
silicon diode (D1) must have a minimum (peak) forward current of
100 µA when the measured voltage is 20 % of FSD. The voltmeter is
to indicate 50 Vrms at full scale. Calculate the values of R, and Rsh-
R,
ISH
IF
Im
Vm
RSH
РММС
instrument
CO
Transcribed Image Text:1700 Ω is used A PMMC instrument with FSD of 50 µA and Rm in the half wave rectifier voltmeter circuit shown in figure. The silicon diode (D1) must have a minimum (peak) forward current of 100 µA when the measured voltage is 20 % of FSD. The voltmeter is to indicate 50 Vrms at full scale. Calculate the values of R, and Rsh- R, ISH IF Im Vm RSH РММС instrument CO
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