Engineer Bhaiya Ji

In this article, you will find the study notes n  Measurement of Low, Medium & High Resistances  which will cover the topics such as  Classification of Resistance, to Measure Low Resistances are Kelvin Bridge Method, Kelvin-Double Bridge Method,  to Measure Medium Resistances such as  Ammeter-Volt Meter Method,  Ohmmeter Method,  Wheat Stone Bridge Method, to measure high resistances  Direct Deflection method, Loss of Charge method & Megha ohm bridge method.  Classification of Resistance Low Resistance  is the range of  '0.1Ω to 1Ω' . Medium Resistance  is the range of  1Ω to few Megha ohm . High resistance  is  .1MΩ to  the  higher  range. Methods For Measurement of Low Resistances Kelvin Bridge Method Kelvin Double Bridge Ammeter – voltmeter method Methods For Measurement of Medium Resistances Ammeter–Voltmeter method Wheat stone bridge method Ohmmeter method Methods For Measurement of High Resistances Direct Deflection methods Loss of Charge methods Megha

In this article, you will find the study notes on  A.C Bridges & Potentiometer  which will cover the topics such as  Maxwell’s inductance bridge, Maxwell’s inductance-capacitance bridge, Hay’s bridge, Anderson’s bridge, Owne’s bridge, De-Sauty Bridge, Wein’s Bridge, D.C Potentiometer & A.C Potentiometer. AC Bridges:  AC bridges are used to measure self inductance, mutual inductance, capacitance and frequency. Types of Sources At low frequency, power line is used as source. At high frequency, electronic oscillator are used as source Types of Detectros Vibration galvanometer at low power frequency and audio frequency (upto 1000 Hz) Head phones at audio frequency (250 Hz to 4 kHz) Tuneable amplifier for frequency range (10 Hz to 100 kHz) General Bridge Circuit At balanced bridge  Magnitude condition  Angle condition  For balanced bridge both the magnitude Measurement of Self Inductance Maxwell’s inductance bridge Maxwell’s inductance-capacitance bridge Hay’s bridge And