Question
Download Solution PDFThe deflection produced by a half wave rectifier type AC voltmeter is how much times the deflection produced by the DC of equal magnitude voltage?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFSensitivity of Rectifier Instruments:
Sensitivity is defined as the deflection per unit current flowing in the coil.
The sensitivity of voltmeter also depends on the circuit resistance which is known as loading effect.
DC Sensitivity(SDC):
Deflection per unit DC current flowing in the coil.
\({S_{DC}} = \frac{1}{{{I_{fs}}}}(\Omega /V)\)
Where Ifs = Full-scale deflection current
AC Sensitivity (SAC):
Deflection per unit AC current flowing in the coil.
Relation Between SAC and SDC
Half wave rectifier: SAC = 0.45 SDC
Full wave rectifier: SAC = 0.9 SDC
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