Question:
Magnetic field due to long wire along y-axis carrying current in -y direction at (50 cm,0,0) points along
Magnetic field due to long wire along y-axis carrying current in -y direction at (50 cm,0,0) points along
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Curl fingers around wire: direction gives magnetic field.
Updated On: Jul 2, 2026
- z-axis
- -z-axis
- x-axis
- -x-axis
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The Correct Option is B
Solution and Explanation
Step 1: Right-hand rule
Thumb → current direction (−y axis)
Step 2: Magnetic field direction At point on +x-axis, field circles around wire. Using right-hand rule: - Current downward (−y) - Field at +x points into page → −z direction Final Answer: \[ \boxed{(B)\; -z\text{-axis}} \]
Step 2: Magnetic field direction At point on +x-axis, field circles around wire. Using right-hand rule: - Current downward (−y) - Field at +x points into page → −z direction Final Answer: \[ \boxed{(B)\; -z\text{-axis}} \]
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