# Help with General class question

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#### Sparkletron

##### Member
Can someone help me understand why the answer I selected is not correct...?

First I determined the current using Ohm's law:

E = IR
I = E / R
I = 400VDC / 800R = 0.5A

Then the power:

P = IE
P = 0.5A x 400VDC = 200W

Last edited:

#### LtDoc

##### Member
Nope, I can't explain why your answer was wrong. Using (I^2)R yields 200 watts, like the W=IE equation. What are they asking for if not the answer to one of those formula?
Is this a multi-part question?
- 'Doc

#### Sparkletron

##### Member
According to the practice test at QRZ, the correct answer is: 32000W. I have a feeling it's just a mistake with their testing application. The exact question is: G5B03.

#### WA3RDF

##### Member
Your answer is correct. I just tried it on QRZ and it showed the right answer. Maybe it was a glitch in the program.

#### Sparkletron

##### Member
Thanks for responding. Good thing this was an answer I was confident in. With some of these questions, I'll accept anything they tell me ;-)

#### kc4jgc

##### Member
Good thinking!

Since we're allowed up to 1500 watts pep on most bands, it wouldn't seem logical that the correct answer would be a power level we would not legally be able to operate. I would have eliminated that one before doing any math.