Question about Ohms Law

[JW]

Hi All, Im studying for an ASE test (L1), I have a question and am looking for a common sense way to figure out this question.

Technician A, says voltage and amperage are inversly proportional to each other as long as resistance remains the same.  Technician B, says amperage and resistance are directly proportional to each other as long as voltage remains the same. Who is right?
A. Technician A, only
B. Technician B, only
C. Both
D. Niether

The answer is B.

Although im very familiar with ohms law, Im having a hard time rationalizing this question, because of the way its worded.

JW

[DanG]

Add "for a given unit of power..."

Amperage is directly proportional to the voltage and inversely proportional to the resistance...

[Madscientist267]

My head hurts.

Grab a PIRE calculator.

 

Steve

[Flux]

I agree with DanG

If resistance is fixed, doubling volts will double the current ( directly proportional).

If voltage is fixed, doubling resistance will halve the current ( inversely Proportional)

I make the answer D

Flux

[JW]

I make the answer D

"If voltage is fixed, doubling resistance will halve the current ( inversely Proportional)"

This is a totally true result of Ohms Law.

the question states as B to being the correct answer and is true if you avoid ohms law.

Technician B, says amperage and resistance are directly proportional to each other as long as voltage remains the same.

"says amperage and resistance are directly proportional to each other"  "as long as voltage remains the same"

"Technician B, says amperage and resistance are directly proportional"

I take this to mean they both rise or fall together. So if voltage is fixed in the function, they must  be "proportional" (amps and resitance).

However, if amps and resistance are inversly proportional, voltage remains the same.

12volts divided by 4 ohms equals 3amps / 12volts divided by 3 ohms equals 4amps

Did I get that right?

I have found several other editing mistakes in this particular study guide, so I seriously doubt the Official test will use such a question.

So the question should read, for B to be correct-

 Technician B, says amperage and resistance are inversly proportional to each other as long as voltage remains the same.

 JW

[commanda]

The answer is obvious. It's a trick question.  The correct answer is..................

E: neither are technicians.

And I seriously doubt the credentials of the clown who wrote the question.