  A unified, consistent and simple view of the Faraday law of induction is
presented, which consists of two points: discriminating the lab- from the
rest-frame electric field and understanding it is the impossibility for both
fields to vanish simultaneously, which generates and maintains the circular
current. A number of illustrative examples are considered, including a
mechano-electric pendulum to exhibit periodic and reversible conversion between
electrical and mechanical energy.
