Polarity

The positive or negative direction of an electrical, acoustical or magnetic force. Two identical signals in opposite polarity are 180 degrees apart at all frequencies. Polarity is not frequency dependent.

Chemistry

A property associated with molecules when the centre of positive charge and the centre of negative charge don't coincide.

Electrical

The direction of current flow in a DC circuit. By convention, current flows from plus to minus. Electron flow is actually in the opposite direction.

Loudspeaker

The loudspeaker cone moves forward when a positive voltage is applied between its red and black terminals, then it is said to have a positive polarity.

Microphone

A microphone has positive polarity if a positive pressure on its diaphragm results in a positive output voltage.

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Subjects: Electrical Engineering Electrochemistry