उच्च आवृत्ति अनुप्रयोगों में इंडक्शन कोर (प्रेरण कोर) के रूप में निम्नलिखित में से कौन-सा पदार्थ सफलतापूर्वक और व्यापक रूप से उपयोग किया जाता 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?