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# Current Measurements

### Bio Med Tech course 1

What is the symbol for Alternating current measurements in the milli amp or amp (unit) range? AC mA/A
What is the symbol for Alternating current measurements in the micro amp range? AC uA
What is the symbol for Direct current measurements in the milli amp or amp (unit)range? DC mA/A
What is the symbol for Direct current measurements in the micro amp range? DC uA
Where do you place the black lead when measuring current? In the common (COM) jack.
Where do you place the red lead when measuring current? In the corresponding amperage jack. When measuring A-amp (unit) measurements. And mA/uA when measuring in the milli or micro amp range
How do you measure current? The multimeter must be placed "IN" the circuit to measure current
In order for current to flow through the meter the circuit has to be? Broker (opened) and the meter inserted
Where do you place the red test lead in reference to the black test lead? Red test lead is placed at a point that is more positive than the black test lead.
What happens if the test leads are reversed on an analog meter? The analog meter's needle moves to the left, off the scale
What happens if the test leads are reversed on a digital meter? The meter will measure a negative value of current. Ignore the negative sign, the value is correct
What happens when a switch on the circuit is closed? Current will not flow through the meter
What happens when a switch on the circuit is opened? Current must pass through the meter
When making current measurements, the meter must be placed where? Must be placed in the series with the current path. Electrons in the path of measurement must flow through the meter.
Created by: 100000215936034

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