A long straight wire and a single circular loop each carry a current of

PHYSICS · Subjective · AP · Physics 2: Algebra-based · Magnetism and Electromagnetism · Magnetism and Electromagnetism

Problem

6\,\text{A}

. The loop has a radius of

4\,\text{cm}

. Calculate the ratio of the magnetic field strength at the centre of the loop to that at a point

4\,\text{cm}

away from the straight wire. State which of the two fields is stronger.