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A straight conductor of circular x-section carries a current.which one of the following statement is true in this regard?
- a)No force acts on the conductor at any point
- b)An axial force acts on the conductor tending to increase its length
- c)A radial force act towards the axis tending to reduce its cross section
- d)A radial force acts away from the axis tending to increase its cross-section
Correct answer is 'C'. Can you explain this answer?
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Most Upvoted Answer
A straight conductor of circular x-section carries a current.which one...
Explanation:
When a straight conductor of circular cross-section carries a current, it experiences a radial force towards the axis tending to reduce its cross section. This is known as the Ampere's force law.
- Ampere's force law: According to Ampere's force law, a straight conductor carrying a current experiences a radial force perpendicular to both the direction of current and the magnetic field produced by it.
- Direction of force: The direction of this force is given by the right-hand rule. If the thumb of the right hand points in the direction of current, and the fingers curl in the direction of magnetic field lines, then the direction of force is perpendicular to both the thumb and the fingers.
- Circular cross-section: In the case of a conductor with a circular cross-section, the direction of force is radial, i.e., perpendicular to the axis of the conductor.
- Effect on cross-section: The radial force acts towards the axis of the conductor, tending to reduce its cross-section. This is because the force is compressive in nature, and it acts on the outer surface of the conductor.
- Effect on conductor: The radial force can cause the conductor to deform or break if the current is high enough. Therefore, conductors are designed to withstand the mechanical stresses caused by this force.
Conclusion:
Hence, option 'C' is the correct answer, i.e., a radial force acts towards the axis of the conductor tending to reduce its cross section.
When a straight conductor of circular cross-section carries a current, it experiences a radial force towards the axis tending to reduce its cross section. This is known as the Ampere's force law.
- Ampere's force law: According to Ampere's force law, a straight conductor carrying a current experiences a radial force perpendicular to both the direction of current and the magnetic field produced by it.
- Direction of force: The direction of this force is given by the right-hand rule. If the thumb of the right hand points in the direction of current, and the fingers curl in the direction of magnetic field lines, then the direction of force is perpendicular to both the thumb and the fingers.
- Circular cross-section: In the case of a conductor with a circular cross-section, the direction of force is radial, i.e., perpendicular to the axis of the conductor.
- Effect on cross-section: The radial force acts towards the axis of the conductor, tending to reduce its cross-section. This is because the force is compressive in nature, and it acts on the outer surface of the conductor.
- Effect on conductor: The radial force can cause the conductor to deform or break if the current is high enough. Therefore, conductors are designed to withstand the mechanical stresses caused by this force.
Conclusion:
Hence, option 'C' is the correct answer, i.e., a radial force acts towards the axis of the conductor tending to reduce its cross section.
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A straight conductor of circular x-section carries a current.which one...
C
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A straight conductor of circular x-section carries a current.which one of the following statement is true in this regard?a)No force acts on the conductor at any pointb)An axial force acts on the conductor tending to increase its lengthc)A radial force act towards the axis tending to reduce its cross sectiond)A radial force acts away from the axis tending to increase its cross-sectionCorrect answer is 'C'. Can you explain this answer?
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A straight conductor of circular x-section carries a current.which one of the following statement is true in this regard?a)No force acts on the conductor at any pointb)An axial force acts on the conductor tending to increase its lengthc)A radial force act towards the axis tending to reduce its cross sectiond)A radial force acts away from the axis tending to increase its cross-sectionCorrect answer is 'C'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A straight conductor of circular x-section carries a current.which one of the following statement is true in this regard?a)No force acts on the conductor at any pointb)An axial force acts on the conductor tending to increase its lengthc)A radial force act towards the axis tending to reduce its cross sectiond)A radial force acts away from the axis tending to increase its cross-sectionCorrect answer is 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A straight conductor of circular x-section carries a current.which one of the following statement is true in this regard?a)No force acts on the conductor at any pointb)An axial force acts on the conductor tending to increase its lengthc)A radial force act towards the axis tending to reduce its cross sectiond)A radial force acts away from the axis tending to increase its cross-sectionCorrect answer is 'C'. Can you explain this answer?.
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