The teacher asked, "What is actually used as a conductor of electricity Little Johnny?"
Little Johnny stammered, "Why...er?"
The teacher smiled and said, "Wire is right. Very good Little Johnny.
Now tell me, what is the unit of electrical power?"
Little Johnny asked, "The what?"
His teacher was very pleased, saying, "That's absolutely correct-- the watt. Now, class, you should all take the time to study as diligently as Little Johnny does."
