A steady current i in a circular loop of radius b produces a magnetic field. At a fixed point along the axis far from the loop (distance z >> b), the strength of the magnetic field is proportional to which of the following combinations of i and b?

Which of the following events is considered a major turning point that fueled Indian nationalism during British rule due to its brutal nature and widespread condemnation?

Which of the following events is considered the first major peasant uprising against the British in India?

Who led the Non-Cooperation Movement in India?