A close-coiled helical spring is subjected to an axial pull of W. If the spring is made out of a rod of diameter d, has n complete coils each of radius R, and the modulus of rigidity of the material is N, then the deflection (δ) under the pull is given by:

Which Indian independence movement leader was primarily known for his philosophy and practice of non-violent civil disobedience?

Who gave the call for 'Do or Die' during the Quit India Movement in 1942?

Which of the following revolutionary pairs were imprisoned together in Cellular Jail and faced harsh conditions, contributing significantly to the Indian independence movement?