Question:
When a proton moves in a uniform magnetic field such that its velocity has a component along the direction of magnetic field, its trajectory will be a
When a proton moves in a uniform magnetic field such that its velocity has a component along the direction of magnetic field, its trajectory will be a
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Parallel velocity gives forward motion; perpendicular gives circular motion → helix.
Updated On: Apr 24, 2026
- circle
- straight line
- helix
- parabola
- ellipse
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The Correct Option is C
Solution and Explanation
Concept:
Magnetic force acts perpendicular to velocity.
Step 1: Velocity components.
• Parallel component $\rightarrow$ unchanged
• Perpendicular component $\rightarrow$ circular motion
Step 2: Resultant motion.
Combination $\rightarrow$ helical path
Step 1: Velocity components.
• Parallel component $\rightarrow$ unchanged
• Perpendicular component $\rightarrow$ circular motion
Step 2: Resultant motion.
Combination $\rightarrow$ helical path
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