AIPMT 2006 Mock Test

Above Curie temperature :

A convex lens and a concave lens, each having the same focal length of $25\text{cm}$, are put in contact to form a combination of lenses. The power in dioptres of the combination is :

An electric dipole of moment $\vec{p}$ is lying along a uniform electric field $\vec{E}$. The work done in rotating the dipole by $90^{\circ }$ is :

A parallel plate air capacitor is charged to a potential difference of $V$ volts. After disconnecting the charging battery, the distance between the plates of the capacitor is increased using an insulating handle. As a result the potential difference between the plates:

A car turns at a constant speed on a circular track of radius $100\text{m}$, taking $62.8\text{s}$ for every circular lap. The average velocity and average speed for each circular lap respectively is :