JEE Main 2026 Physics question
A 5 mg particle carrying a charge of 5π×10⁻⁶ C is moving with velocity of (3î+2k̂)×10⁻² m/s in a region having magnetic field B⃗=0.1k̂ Wb/m². It moves a distance of α meter along k̂ when it completes 5 revolutions. The value of α is .
Answer: 2
Solution
The component along B⃗ (2×10⁻² m/s) is unchanged. The period is
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