NEET 2018 PYQs | NEET important physics question 410 | magnetic force on moving charge | #neetpyq

🧲⚡ NEET 2018 PYQ – Electromagnetic Force ⚡🧲

A very important and direct formula + concept-based question from Moving Charges & Magnetism! 🎯

🔍 Key Concept:

A charged particle or current-carrying conductor experiences force in a magnetic field

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📌 Force on Moving Charge:

F = qvB\sin\theta

👉 Where:

* q = charge
* v = velocity
* B = magnetic field
* \theta = angle between \vec v and \vec B

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📌 Force on Current-Carrying Wire:

F = BIL\sin\theta

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📌 Important Logic:

✔ Maximum force when:
\theta = 90^\circ

✔ Zero force when:
\theta = 0^\circ

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📌 Direction Rule:

👉 Use Fleming’s Left Hand Rule for direction of force

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✅ Final Idea:

💡 Magnetic force always acts perpendicular to motion/current

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✨ Shortcut Tip:
Parallel motion ⇒ no magnetic force
Perpendicular motion ⇒ maximum force

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