Sliding contact, charging

This operation is a sliding-contact type operation. From Table 7-3 this operation gives a charge of 10 5 coulomb/kg. Therefore the charge buildup is... 

These contacts closed when the bomb had fallen from 1 to 3 inches from the rack. This prevented charging of the fuze while the bomh was still in the aircraft. The two sliding contacts were connected to the positive terminal of the 240 volt battery. The B plunger circuit was connected directly while the A plunger circuit was connected thru a selector switch which had two positions open (MV) with delay, and closed (OV) without delay. 

For identical substrates the chemical potential before and after contact remains the same. There should be no charge transfer However, if there are temperature differences, which would be the case in sliding contact, there would be a readjustment in concentration and charge transfer. 

Charging by contact electrification is an active mechanism whenever dissimilar particles make and break contact with each other, or whenever they slide over a chute or an electrode. This charging mechanism is most frequently used to charge selectively and obtain an electrostatic separation of two species of dielectric materials as realized in a free fall electrostatic separator. 

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