Magnetic Effects of Current and Magnetism: JEE Main 2026 Physics question

JEE Main 2026 · 21 Jan, Evening shift · Q41

JEE Main 202621 Jan, Evening shiftPhysicsEasyMagnetic Effects of Current and Magnetism165× since 2002

An infinitely long straight wire carrying current

I

is bent in a planer shape as shown in the diagram. The radius of the circular part is

r

. The magnetic field at the centre

O

of the circular loop is :