squirrely2005 Aug 26, 2011 Texas. From what I understand a pint is 16 ounces. I learned that from drinking Busch while living with my dad a few years ago. It just hit me the other day that I have a few glasses that are pint glasses but pouring a 12 ounce beer in them basically fills it up.
Hans Christian Oersted. In 1820, a Danish physics teacher observed that the current moving through a wire moved the needle on a nearby compass. when the current was reversed, the compass needle was deflected in the opposite direction. these magnetic effects ceased when the current in the wire stopped.
Because the magnetic field of the Earth will always influence the compass, the magnetic field direction indicated by the compass when the circuit is closed is the superposition of the field due to the Earth and the field due to the wire.