Class 10 Exam > Class 10 Questions > Find the incorrect statement:a)The P. D. for ...
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Find the incorrect statement:
- a)The P. D. for all the resistors in the parallel circuit remains constant.
- b)The direction of flow of negative charge was taken to be the direction of electric current.
- c)The SI unit of electric charge is coulomb.
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Find the incorrect statement:a)The P. D. for all the resistors in the ...
Explanation:As a convention, the direction of flow of positive charge was taken to be the direction of electric current. The direction of flow of electrons is opposite to the direction of conventional current.
Most Upvoted Answer
Find the incorrect statement:a)The P. D. for all the resistors in the ...
Yes, option B is incorrect as the direction of current in the external circuit is directed away from the positive terminal and toward the negative terminal of the battery. Electrons would actually move through the wires in the opposite direction.
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Find the incorrect statement:a)The P. D. for all the resistors in the ...
Understanding the Incorrect Statement
The correct answer is option 'B'. Let's delve into why this statement is incorrect.
Current Flow Direction
- The statement claims that the direction of flow of negative charge was taken to be the direction of electric current.
- In reality, electric current is defined as the flow of positive charge. Historically, Benjamin Franklin assumed current flowed from positive to negative, which is contrary to the actual flow of electrons (negative charges).
- Therefore, the accepted convention of current direction is opposite to the flow of negative charges.
Analysis of Other Statements
- Statement A: The P.D. for all the resistors in a parallel circuit remains constant.
- This is true since all resistors in a parallel circuit share the same voltage across their terminals.
- Statement C: The SI unit of electric charge is coulomb.
- This is also true, as the coulomb (C) is indeed the standard unit for measuring electric charge.
- Statement D: None of these.
- As we identified option B as incorrect, this statement is also true.
Conclusion
The confusion arises from the historical context of how current was defined. While it's common to refer to current direction as the flow of positive charge, the actual movement of electrons is in the opposite direction. Thus, option 'B' is the incorrect statement, highlighting the importance of understanding the conventions in physics.
The correct answer is option 'B'. Let's delve into why this statement is incorrect.
Current Flow Direction
- The statement claims that the direction of flow of negative charge was taken to be the direction of electric current.
- In reality, electric current is defined as the flow of positive charge. Historically, Benjamin Franklin assumed current flowed from positive to negative, which is contrary to the actual flow of electrons (negative charges).
- Therefore, the accepted convention of current direction is opposite to the flow of negative charges.
Analysis of Other Statements
- Statement A: The P.D. for all the resistors in a parallel circuit remains constant.
- This is true since all resistors in a parallel circuit share the same voltage across their terminals.
- Statement C: The SI unit of electric charge is coulomb.
- This is also true, as the coulomb (C) is indeed the standard unit for measuring electric charge.
- Statement D: None of these.
- As we identified option B as incorrect, this statement is also true.
Conclusion
The confusion arises from the historical context of how current was defined. While it's common to refer to current direction as the flow of positive charge, the actual movement of electrons is in the opposite direction. Thus, option 'B' is the incorrect statement, highlighting the importance of understanding the conventions in physics.
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Find the incorrect statement:a)The P. D. for all the resistors in the parallel circuit remains constant.b)The direction of flow of negative charge was taken to be the direction of electric current.c)The SI unit of electric charge is coulomb.d)None of theseCorrect answer is option 'B'. Can you explain this answer?
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