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DESCRIPTION :
This coil, specially designed for school use is suitable for vacuum tubes and audiometers etc. It is wound with insulated copper wire, has tungsten contacts and on/off reversing switch as communicator. Voltage tested condensers are fitted inside the teak polish wooden box. The top of the wooden box is provided with sunmica and relevant data engraved on the sunmica. Terminals are provided for H.T. output and L.T. input of the coil. Up to 50 mm spark is obtained with 4 to 6 volt D.C. input .
DESCRIPTION :
For determining temperature co-efficient resistance of copper, comprising a coil of fine enameled copper wire of about 7-10 ohms resistance, wound non-conductively on an insulating frame and connected to thick copper wire fitted with terminals. The coil is enclosed in a glass tube of borosilicate glass to contain paraffin oil. The rubber stopper is drilled for a thermometer. Tube size approx. 100mm x25mm dia
Amandeep Singh & Mr. Amarjeet Singh (Kalgidhar Scientific Works)
Cross Road No-3, NEAR: B.D. SR. SEC. SCHOOL, Punjabi Mohalla,, Ambala Cantt, Haryana - 133001, India
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