Physics Review Question

Unit: Electricity and Magnetism
Year: 1993 Question#: 29
Question: The slope of the graph at the right represents

(1 ) resistance of a material
(2 ) electrical field intensity
(3 ) power dissipated in a resistor
(4 ) electrical energy

What is this question really asking?




Explanation by: Dana H

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Answer 1
resistance of a material

CORRECT
Correct, R=V/I, The potential difference is V and the current is I.
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Answer 2
electrical field intensity

Incorrect,
information on frequency and charge would have to be given. 
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Answer 3
power dissipated in a resistor

Nothing is mentioned about a resistor and P=VI not V/I 
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Answer 4
electrical energy

INCORRECT

The electrical energy can not be determined by this graph. return to top

What's this question really asking?
What is the slope of a potential difference vs. current graph?
Remember, slope is the change in y divided by the change in x.
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