AIEEE 2005 Physics Question Paper Mock Test

A fully charged capacitor has a capacitance ‘$C$ ’. It is discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity ‘$s$ ’ and mass ‘$m$ ’. If the temperature of the block is raised by ‘$\Delta T$ ’, the potential difference $V$ across the capacitance is:

One conducting U-tube can slide inside another as shown in figure, maintaining electrical contacts between the tubes. The magnetic field $B$ is perpendicular to the plane of the figure. If each tube moves towards the other at a constant speed $V$, then the emf induced in the circuit in terms of $B,l$ and $V$ where $l$ is the width of each tube will be:

A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be:

Two thin, long parallel wires separated by a distance ‘$d$ ’ carry a current of ‘$i$ ’ A in the same direction. They will:

When an unpolarized light of intensity $I_0$ is incident on a polarizing sheet, the intensity of the light which does not get transmitted is: