A student draws an imaginary square of area perpendicular to the magnetic field at…
PHYSICS · Subjective · CBSE · Physics · Magnetic Effects of Electric Current · Magnetic Effects of Electric Current
Problem
A student draws an imaginary square of area 1cm2 perpendicular to the magnetic field at two locations near a bar magnet.
Through point A, eight field lines pass the square, while through point B, only two lines pass the same-sized square.
Calculate the ratio BA:BB of the magnetic field strengths at A and B.