NEET Exam Patterns for MAG-01

Frequency: 2–3 questions per year consistently; Chapter appears in Phase 2 of NEET preparation timeline
Most tested concept (2017–2024): Time period T = 2π $\frac{m}{qB}$ independence from velocity — appears almost every other year in some form
Second most tested: Magnetic force does no work — conceptual question with velocity/KE angle
Galvanometer conversion numericals (NEET 2018, 2021): Always involves computing S = $\frac{I_gG}{I−I_g}$ for ammeter or R = $\frac{V}{I_g}$ − G for voltmeter; trap is mixing up parallel/series
Biot-Savart field numericals (NEET 2020, 2022): B at centre of coil with given N, R, I; sometimes asks for comparison of centre vs axial field
Force between parallel wires (NEET 2017, 2020): Given currents and separation, compute F/l; plus conceptual — same direction attract vs opposite repel
Magnetic materials (NEET 2019, 2022): Match susceptibility values to material types; identify correct material for permanent magnet (high coercivity) vs electromagnet (low coercivity)
Ampere's law application (NEET 2018, 2023): Field inside solenoid vs outside; toroid field in different regions
Common NEET traps:
- Speed of particle doubled → what happens to T? (Answer: unchanged)
- Which modification makes ammeter? (Answer: parallel shunt, NOT series)
- Solenoid length doubled keeping N constant → B? (Answer: B halves, since n halves)
- Diamagnetic χ value → is it positive or negative? (Answer: negative)
- Above Curie temperature: ferromagnet becomes? (Answer: paramagnetic)
Scoring pattern: Questions are 60% conceptual + 40% numerical; conceptual questions are higher frequency but numerical questions are more predictable
Recommended focus: Master T = 2π $\frac{m}{qB}$ , r = $\frac{mv}{qB}$ , galvanometer formulas, and material classification; these four areas account for ~75% of marks from this chapter