WB JEE 2017

A uniform string of length L and mass M is fixed at both ends while it is subject to a tension T. It can vibrate at frequencies (v) given by the formula (where n = 1, 2, 3, ....)

The dimension of the universal constant of gravitation, G is

Three vectors \(\overrightarrow A\) = a\(\widehat i\) + \(\widehat j\) + \(\widehat k\); \(\overrightarrow B\) = \(\widehat i\) + b\(\widehat j\) + \(\widehat k\) and \(\overrightarrow C\) = \(\widehat i\) + \(\widehat j\) + c$$\widehat ...

Two monochromatic coherent light beams A and B have intensities L and \({{L \over 4}}\), respectively. If these beams are superposed, the maximum and minimum intensities will be

A bullet of mass 4.2 \(\times\) 10\(-\)2 kg, moving at a speed of 300 ms\(-\)1, gets stuck into a block with a mass 9 times that of the bullet. If the block is free to move without any kind of friction, the heat generated in the process w...