निम्नलिखित में से किस उपकरण का उपयोग इल्यूमिनेन्स (प्रदीप्ति घनत्व) को मापने के लिए किया जाता है, जो विद्युत प्रकाश व्यवस्था से संबंधित है?

Which movement aimed to promote Khadi, a hand-spun and handwoven cloth native to India?

Who were prominent leaders associated with the initial phase of the Telangana Rebellion (1946-1951) against the Nizam's rule and feudal landlords?

What was the immediate trigger for the Revolt of 1857?