MHT-CET, JEE Exam

Force between two point charges  q₁ and q₂ placed in vacuum at 'r' cm apart is F. Force between them when placed in a medium having dielectric K = 5 at 'r / 5' cm apart will be:

A thin circular disc of mass M and radius R is rotating in a horizontal plane about an axis passing through its centre and perpendicular to its plane with angular velocity 'w'. If another disc of same dimensions but of of mass M/2 is placed gently on the first disc co-axially, then the new angular velocity of the system is :

Correct Bernoulli's equation is (symbols have their usual meaning)

Two projectiles are projected at 30⁰ and 60⁰ with the horizontal with the same speed. The ratio of the maximum height attained by the two projectiles respectively is:

A real gas within a closed chamber at 27⁰ C undergoes the cyclic process as shown in figure. The gas obeys P V ³ = RT equation for the path A to B. The net work done in the complete cycle is (assuming R=8J/molK):