AIPMT 2011 Preliminary Mock Test

Four electric charges $+q,+q,-q$ and $-q$ are placed at the corners of a square of side $2L$. The electric potential at point $A$, midway between the two charges $+q$ and $+q$, is:

A parallel plate condenser has a uniform electric field $E$ (V/m) in the space between the plates. If the distance between the plates is $d$ (m) and area of each plate is $A$ ($m^2$), the energy (joules) stored in the condenser is:

If power dissipated in the $9\Omega$ resistor in the circuit shown is $36\text{Watt}$, the potential difference across the $2\Omega$ resistor is:

A current of $2\text{A}$ flows through a $2\Omega$ resistor when connected across a battery. The same battery supplies a current of $0.5\text{A}$ when connected across a $9\Omega$ resistor. The internal resistance of the battery is:

The rate of increase of thermo e.m.f. with temperature at the neutral temperature of a thermocouple: