NCERT In-text 12.3 — Q3 - Magnetic Effects of Electric Current
Question: A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is (a) towards south (b) towards east (c) downward (d) upward
Answer: Answer: **(d) upward**.
Full step-by-step NCERT solution with diagrams on Something by Zero.