A positive particle enters normally into a uniform magnetic strip. Its magnetic radius is r and the strip width is r/2. Determine its deflection angle in degrees before crossing the far boundary.
Physics · Magnetic effect of current · motion of charge particle in magnetic field
JEE Mains NEET

Question

A positive particle enters normally into a uniform magnetic strip. Its magnetic radius is r and the strip width is r/2. Determine its deflection angle in degrees before crossing the far boundary.

G1 Physics · Accepted Answer

For normal entry, sinφ=d/r=1/2. Hence φ=30°.