A shock collar, also known as an e-collar, Ecollar, or electronic collar, is a type of collar that delivers electrical current to the neck of its wearer, in an effort to control behaviour as a form of
A typical shock collar.
Shock collar used on a riot police dog in 2004 in Würzburg. Two years later, Germany banned the use of shock collars, even by police.
The ampere, often shortened to amp, is the unit of electric current in the International System of Units. One ampere is equal to 1 coulomb moving past a point per second. It is named after French math
Demonstration model of a moving iron ammeter. As the current through the coil increases, the plunger is drawn further into the coil and the pointer deflects to the right.