"Action of current on solenoids. To demonstrate this fact experimentally, a solenoid is constructed…
"The polarity of the solenoidal magnet may be determined by holding it in the right hand so that the…
"Magnetic field of a solenoid. This is best observed by cutting a piece of cardboard and fitting it…
"Right hand rule for polarity of a solenoid: If the solenoid be grasped in the right hand, so that the…
"A coil of wire through which an elecric current is flowing shows magnetic properties similar to those…
"Coil some No. 12 copper wire throuh holes in a board, as shown, and pass a strong current through it.…
"Illustrating the effects of introducing an iron core into a solenoid. In the upper firgure, the air…
"Mutual action of solenoids. When two solenoids traversed by a current are allows to act on each other...attraction…
"Place a strip of shet iron in the solenoid, as shown...Hotice that most of the lines of force are gathered…