निम्नलिखित में से किस पदार्थ का प्रतिरोध तापमान गुणांक धनात्मक (positive temperature coefficient) होता है?

The Dandi March, also known as the Salt Satyagraha, was led by which influential leader?

Which act formally granted independence to India, marking the end of British rule?

Who was the key figure in establishing the Indian National Congress?