NEET 2010 PYQ Mock Test

In producing chlorine by electrolysis $100\text{ kW}$ power at $125\text{ V}$ is being consumed. How much chlorine per minute is liberated (E.C.E. of chlorine is $0.367\times 10^{-6}\text{ kg/C}$)?

A square current carrying loop is suspended in a uniform magnetic field acting in the plane of the loop. If the force on one arm of the loop is $\vec{F}$, the net force on the remaining three arms of the loop is:

A thin ring of radius $R\text{ meter}$ has charge $q\text{ coulomb}$ uniformly spread on it. The ring rotates about its axis with a constant frequency of $f\text{ revolutions/s}$. The value of magnetic induction in ${\text{Wb/m}}^2$ at the centre of the ring is:

Electromagnets are made of soft iron because soft iron has:

A vibration magnetometer placed in magnetic meridian has a small bar magnet. The magnet executes oscillations with a time period of $2\text{ sec}$ in earth's horizontal magnetic field of $24\text{ microtesla}$. When a horizontal field of $18\text{ microtesla}$ is produced opposite to the earth's field by placing a current carrying wire, the new time period of magnet will be: