Ballistic Galvanometer of small quantities of electrical charge. the moving coil is suspended by a phosphor bronze strip, which carries an optically true concave mirror. The coil can be raised, lowered or set to zero by an adjusting knurled knob at top. A knob at back is provided for clampingand releasing the coil. With levelling screws. Resistance Period.
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Ambala Cantt, Ambala, Haryana