किसने यह खोजा था कि एक धारावाही चालक (current-carrying conductor) के चारों ओर संकेंद्रित वृत्ताकार रेखाओं के रूप में एक चुंबकीय क्षेत्र मौजूद होता है?

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?