January 26, 2014

FCC Technician Exam Question Of The Day (T6A11)

Q) Which battery type is not rechargeable?

A) Carbon-zinc

NJ2X Notes:
A zinc–carbon battery is made up of a zinc outer canister that serves as both a container and negative terminal. The positive terminal is a carbon rod surrounded by a mixture of manganese dioxide and carbon powder with an electrolyte of paste of zinc chloride and ammonium chloride dissolved in water.  A typical A, AA, C, or D zinc-carbon cell has an electromotive force (emf) about 1.5V.  Zinc-carbon batteries are not rechargeable.

Alkaline Battery