Potentiometer 1. Pr imary standard of emf saturated( Saturated Normal Weston cell ) 2. Secondary Standard of Emf ( Unsaturated Weston cell ) 3. Zener-controlled voltage source (Laboratory standard of Emf. )
-- Ac bridge sources and detectors -- The general form of ac bridge -- Maxwell's Bridge -- Hay's Bridge -- Anderson's Bridge -- Heaviside Bridge -- Campbell's modification of Heaviside Bridge -- Cambell's Bridge -- Wein's Bridge
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