10- The basic component of digital voltmeter are: a- AID converter and a counter. c-DVA converter and a counter. b- AD converter and a rectifier. d-Ramp generator and a counter. 11- A d.c voltmeter has a sensitivity of 1000 2/V when it measures half full scale in 100V range, the current through the voltmeter is: a- 100mA b- ImA d- 50mA a- Distortion meter. c-spectrum analyzer. c- 0.5mA 12- A DVM measure....... a- peak value. b- RMS value. c-Average value. d- peak to peak value. 13. The study of energy distribution across the frequency spectrum of a given electrical signal is done by a b-wave analyzer. d-Q-meter. 14. The harmonic distortion percentage is accurately measured by: a- VTVM. c- harmonic distortion analyzer. b-CRO. d- VOM.