19 Feb 14, 06:12PM
V=IZ. If the current drawn by load is greater than the rating that the source can supply, the voltage starts dropping.
It is voltage across because voltage is always given with respect to a reference point. So you are measuring the voltage from one side of the thing in the circuit. Generally, if you give a voltage without a reference point, it is understood that you are measuring with respect to ground.
It is voltage across because voltage is always given with respect to a reference point. So you are measuring the voltage from one side of the thing in the circuit. Generally, if you give a voltage without a reference point, it is understood that you are measuring with respect to ground.