IIT-JEE Exam

5.6 liter of helium gas at STP is adiabatically compressed to 0.7 liter. Taking the initial temperature to be
T1, the work done in the process is

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IIT-JEE Other Question

The wavelength of the first spectral line in the Balmer series of hydrogen atom is 6561 A0. The wavelength
of the second spectral line in the Balmer series of singly-ionized helium atom is
(A) 1215 A0 (B) 1640 A0
(C) 2430 A0 (D) 4687 A0 ball of mass (m) 0.5 kg is attached to the end of a string having length
(L) 0.5 m. The ball is rotated on a horizontal circular path about vertical
axis. The maximum tension that the string can bear is 324 N. The
maximum possible value of angular velocity of ball (in radian/s) is
(A) 9 (B) 18
(C) 27 (D) 36