Unit: electricity and magnetism
Year: 1989 Question#: 32
Question: Which graph represents a circuit element at constant temperature that obeys Ohm's law?
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What is this question really asking?
Explanation by: Esy C.
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Answer 1
INCORRECT
It says V is constant as I increases -disobeys Ohm's Law
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Answer 2
INCORRECT
It says V grows exponentially as I increases.
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Answer 3
INCORRECT
It says the opposite of Ohm's law - inverse relationship.
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Answer 4
CORRECT
Resistance of a conductor is constant as the V and I vary. A direct relationship.
As current increases so must the potential difference that caused it.
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What's this question really asking?
Which graph best represents the relationship between V and I (at a constant temp)
according to Ohm's law?
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