Physics Review Question

Unit: electricity
Year: 1987 Question#: 9
Question: Which condition must exist between two points in a conductor in order to maintain a flow of charge?

(1 ) A potential difference
(2 ) A magnetic field
(3 ) A low resistance
(4 ) A high resistance

What is this question really asking?




Explanation by: John D (no last names)

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Answer 1
A potential difference

CORRECT

Answer 1 is correct because all electric currents need a reason to flow. return to top























Answer 2
A magnetic field

INCORRECT


Answer 2 is incorrect because a magnetic field is not needed to maintain a flow of charge. return to top



























Answer 3
A low resistance

INCORRECT

Answer 3 is incorrect because a low resistance does affect the flow of charge but current can still flow with or without it. return to top


























Answer 4
A high resistance

INCORRECT
Answer 4 is incorrect because a charge can still flow with a high resistance. return to top


























What's this question really asking?

This question is really asking what is the condition necessary to maintain a flow of charge. return to top

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