In case of grounded load load is grounded and voltage is measured across it.
while in case of floating load load is not grounded instead it is connected in feedback circuit.
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hot load occurs when the power is high and the cold load occurs when yhe power is low
well the difference mainly exists in the method of finding them , these are :-1. in finding DC load line :-open all AC sourcesopen all the capacitors2. for AC load line:-open all the Dc sourcesshort all the capacitors.
when a resistive load is applied there is no phase angle difference between voltage and current. when a inductive load is applied there is phase difference between voltage and current. current lags voltage by an angle of 90 degrees for pure inductive load
The phase diference is proportional to the load
'Voltage' is simply another term for 'potential difference', and an electromotive force is the open-circuit, or no-load, potential difference of a source such as a battery or generator.