ऊष्मा संचरण (heat transfer) की मुख्य रूप से कितनी विधियाँ होती हैं?

Which of the following territories was annexed by Lord Dalhousie under the pretext of misgovernance, and not directly through the Doctrine of Lapse?

What was the primary stated reason for the Partition of Bengal in 1905 by Lord Curzon?