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Electrical Definitions |
Jack : The receptacle on a telephone or telegraph switch board,etc. provided with a metallic bush and several contact springs behind the board for making contact with a plug attached to a flexible cord,the various parts of the plug making contact with the different springs and also separating contact with the different springs and also separating contacts normally existing between the springs or closing contacts normally open. |
Jamming : The sending of disturbing radio signals to interfere with the reception of another message,as in the operations of war time. |
Johnson Counter : It is a type of digital counter characterised by a unique sequence of states. |
Junction : It is the boundry between n-region and p-region in a semiconductor device. |
Jumper Wire in Automatic Telephony : A temporary connecting wire in a cross-connection field during repair or rearrangement of permanent connections. |
Junction Selector in Automatic Telephony : A selector responding to the current impulse of the exchange code in a call dialled,the function of which is to make connection through a vacant junction line between a first selector and an appropriate thousands selector in the wanted exchange. |
Junction T : A junction of waveguide in which the lingitudinal waveguide axes form a 'T'. |
Junction Y : A junction waveguide in which the longitudinal axis forms a 'Y'. |