Answer
560 W
Work Step by Step
The formula to be used here is,
P= $V\times I$
where P is Power in watts, V is Voltage in Volts and I is Current in Amperes
According to the data in the question,
V is 80 kV or 80000V
I is 7 mA or 0.007 A
Substituting these values in the equation, P is found to 560 W
