The change of cross sectional area of conductor in magnetic field will affect
A. reluctance of conductor.
B. resistance of conductor.
C. (A) and (B) both in the same way.
D. none of above.
Answer: C
Share your understanding of this question with the correct explanation.
The change in the cross-sectional area of a conductor in a magnetic field will affect both the reluctance and the resistance of the conductor. Therefore, the correct answer is C: “(A) and (B) both in the same way.”
Here’s a further explanation:
A. Reluctance of conductor: Reluctance is a property that opposes the flow of magnetic flux through a material. It is analogous to resistance in electrical circuits. The reluctance of a conductor depends on its dimensions, including the cross-sectional area. When the cross-sectional area of the conductor changes, the reluctance also changes. An increase in cross-sectional area decreases the reluctance, allowing more magnetic flux to flow through the conductor.
B. Resistance of conductor: Resistance is a property that opposes the flow of electrical current through a material. The resistance of a conductor is primarily determined by its dimensions, including the cross-sectional area. When the cross-sectional area of the conductor changes, the resistance also changes. According to the formula for resistance (R = ρ * (L / A)), where ρ is the resistivity of the material, L is the length of the conductor, and A is the cross-sectional area, an increase in cross-sectional area (A) decreases the resistance (R) of the conductor.
Therefore, both the reluctance and resistance of the conductor are affected in the same way by a change in the cross-sectional area of the conductor in a magnetic field.