megacoulomb

Megacoulomb is a unit of electric charge equal to one million coulombs. It is formed by applying the SI prefix mega- to the coulomb, and is sometimes abbreviated as MC. Thus, 1 MC = 1 × 10^6 C.

Because a coulomb is the charge transported by a current of one ampere in one second, a megacoulomb corresponds to 1,000,000 ampere-seconds. For example, a current of 1 ampere flowing for about 11.6 days yields roughly 1 MC, and a current of 1 megaampere for 1 second also yields 1 MC.

Megacoulombs describe very large charges and are rarely used in everyday electronics. They may appear in discussions of large-scale electrical systems, energy storage at grid or industrial scales, or in theoretical calculations. In practical contexts, charges are typically expressed in coulombs or in much smaller units such as millicoulombs or microcoulombs.

In summary, the megacoulomb is a straightforward, large-scale unit for electric charge, equal to 10^6 coulombs, and is primarily encountered in specialized or theoretical discussions rather than routine electrical work. See also coulomb, ampere, electric charge, and SI prefixes.