IVolmeter ye-EDM

Iinjongo zeVoltmeter ngokubanzi, ezilungele ilabhoratri yesikolo ukulinganisa umbane kwisekethe yeDC ..-Kunye nokukhuselwa kwesekethe yesilicon diode kwisinxibo semitha, simahla kumonakalo omninziUkuchaneka kwesikali esipheleleyo se?