List of top Questions asked in UPSEE- 2005

An ideal gas is taken from point $ A $ to the point $ B $ , as shown in the $ p-V $ diagram, keeping the temperature constant. The work done in the process is :

A Carnot engine whose low temperature reservoir is at $ 7^??, C $ has an efficiency of $ 50\% $ . It is desired to increase the efficiency to $ 70\% $ . By how many degrees should the temperature of the high temperature reservoir be increased ?

In Young?? double slit experiment, the slits are $ 3 \,mm $ apart. The wavelength of light used is $ 5000\, ??$ and the distance between the slits and the screen is $ 90 \,cm $ . The fringe width in $ mm $ is :

A circular disc of radius $ R $ rolls without slipping along the horizontal surface with constant velocity $ v_0 $ . We consider a point $ A $ on the surface of the disc. Then the acceleration of the point $ A $ is :

A moving coil galvanometer has a resistance of $ 10\, O $ and full scale deflection of $ 0.01\, A $ . It can be converted into voltmeter of $ 10\, V $ full scale by connecting into resistance of :

The number of free electrons per $ 100 \,mm $ of ordinary copper wire is $ 2 ??10^{21} $ . Average drift speed of electrons is $ 0.25\, mm/s $ . The current flowing is :

Find the dimensions of electric permittivity.

$ 1\,Wb/m^2 $ is equal to :