निम्नलिखित में से किस विद्युत उपकरण में स्थैतिक रूप से प्रेरित विद्युत वाहक बल (statically induced emf) उत्पन्न 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?