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A.C. voltages are measured using _________

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A.C. voltages are measured using _________

(a) oscillators and op amps

(b) rectifiers and filters

(c) resistor and capacitor

(d) inductor and resistor

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My question is from Digital Multimeter in division Electronic Instruments of Electrical Measurements

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The correct choice is (b) rectifiers and filters

To elaborate: Rectifiers and filter circuits with various configurations are employed for measuring A.C. voltages. A.C. is converted to D.C. and is applied to the A/D converter.

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