Home Physics Lab Physics Lab Equipment RESISTANCE BOX PLUG TYPE CONSTANTAN COIL

RESISTANCE BOX PLUG TYPE CONSTANTAN COIL

Modal: ST334

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RESISTANCE BOX PLUG TYPE CONSTANTAN COIL

Precision quality resistance box consist of 12mm (approx. 1/2”) thick rectangular brass block, non inductive, double covered Eureka Constantan wire is wound on bakelite spool, enclosed in a teak wood box. Accuracy + 0.1%. Construction Details: In plug type resistance box the contact between plug and socket is the most important feature affecting reproducibility of results. Use tapered brass plug and split block. Although expensive to make, this is the best form of contact. It requires accurate machining to ensure interchangeability (i.e. plugs and lugs are cut to a fine Selected double cover Eureka or Manganin wire is wound on the bakelite spool. Sufficient heat treatment is processed through to avoid any appreciable shifting of values. The coils are mounted on the lower side to an insulating panel with the help of threaded brass leads and connected across the gap between the heavy brass blocks which are mounted on the panel. The top panel is provided with two heavy type brass terminals. The coils are clearly marked on the panel. The case is made of Teak wood.