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.
Measuring electricity. We can measure electricity in a number of different ways, but a few measurements are particularly important. Photo: You can use a digital multimeter like this to measure voltage, current, and resistance. Voltage. The voltage is a kind of electrical force that makes electricity move through a wire and we measure it in volts.