एक प्रेरक कुंडली (inductor coil) में प्रवाहित होने वाली धारा को कितने प्रतिशत बढ़ाया जाना चाहिए ताकि कुंडली द्वारा संचित ऊर्जा दोगुनी हो जाए?

The arrival of which commission in India triggered widespread protests, including mass hartals across the country in 1928?

Which of the following leaders was instrumental in initiating and leading India’s struggle for independence?