KREATRYX: Knotes - Electrical and Electronic Measurements.PDF. Contents: Error Analysis, Electro-Mechanical Instruments, Potentiometer / Null Detector, Instrument Transformer, AC Bridges, Measurement of Resistance, Cathode Ray Oscilloscope (CRO), Digital Meters, Q–meter / Voltage Magnifier, etc. To get the file, download the Electrical and Electronic Measurements Notes for Competitive Exams GATE IES PSU PDF.