Ammeter through a wire which expands as it heats. Although these instruments have slow response time and low accuracy, they were sometimes used in measuring radio-frequency current. These also measure true RMS for an applied AC. In much the same way as the analogue ammeter formed the basis for a wide variety of derived meters, including voltmeters, the basic mechanism for a digital meter is a digital voltmeter mechanism, and other types of meter are built around this. Digital ammeter designs use a shunt resistor to produce a calibrated voltage proportional to the current flowing. This voltage is then measured by
Jim Measures Jim Measures James Measures (born 14 April 1939), also known by the nickname of "Jim", is an English former professional rugby league footballer who played in the 1950s and 1960s. He played at representative level for Great Britain, and at club level for St Helens, Widnes and the Rochdale Hornets, as a , i.e. number 11 or 12, during the era of contested scrums. Measures was born in St. Helens, Lancashire, England. Jim Measures won caps for Great Britain while at Widnes in 1963 against Australia (2 matches). Jim Measures played left-, i.e number 11, in Widnes' 13-5 victory over