एक पृथक रूप से उत्तेजित (separately excited) डीसी जनरेटर में, प्राइम मूवर यांत्रिक रूप से किससे जुड़ा होता है?

The 'Drain of Wealth' theory was propounded by which Indian nationalist leader?

Which event is considered the turning point in Mahatma Gandhi's leadership in the Indian independence movement?

Which African leader is known for his non-violent opposition to colonial rule?