first cause, prime mover, primum mobile - an agent that is the cause of all things but does not itself have a cause; God is the first cause destiny, fate - the ultimate agency regarded as predetermining the course of events (often personified as a woman); we are helpless in the face of destiny
Which Side of a Battery is Positive? A cell or battery is drawn with a long line and a shorter line. The long line is the positive side (plus is longer). The short line is the negative side (minus is shorter).
When is in the positive part of its cycle, a positive voltage is produced on the secondary side of the transformer. This voltage forward biases the diode and the diode begins passing current. As a result most of the voltage drops across the load. When is negative, then the secondary side also has a negative voltage.