Lowers Recommended Lead-Level Limits in Children. For the first time in 20 years, federal health authorities have lowered the recommended limit for lead exposure in young children, which they say could add 200,000 children to those believed to have unsafe lead levels in their blood.
Electrical Units of Measure. The standard SI units used for the measurement of voltage, current and resistance are the Volt [ V ], Ampere [ A ] and Ohm [ Ï ] respectively.
Unit of electric current (ampere) Electric units, called international, for current and resistance were introduced by the International Electrical Congress held in Chicago in 1893, and the definitions of the international ampere and the international ohm were confirmed by the International Conference of London in 1908.