President Barack Obama (right) and James Comey (left) in the White House Rose Garden, Washington, D.C., June 21, 2013, as Obama announced Comey's nomination as FBI Director. The Director of the Federal Bureau of Investigation (FBI) is appointed by the President and, since 1972, confirmed by the Senate.
An electric bill is a bill for the consumption of electric energy.
In electromagnetism, current density is the electric current per unit area of cross section. It is defined as a vector whose magnitude is the electric current per cross-sectional area at a given point in space (i.e. it is a vector field).In SI units, the electric current density is measured in amperes per square metre.lectric current density J is simply the electric current I (SI unit: A) per unit area A (SI unit: m 2). Its magnitude is given by the limit :