List of top Physics Questions on Electrostatics asked in TS EAMCET

The potential difference between the ends of a wire at all temperatures is constant and is \(240\,\text{V}\). When the temperature of the wire is increased from \(0^\circ\text{C}\) to \(1000^\circ\text{C}\), its resistance increases by \(25\,\Omega\). If the temperature coefficient of resistance of the material of the wire is \(1.25\times10^{-4}\,^\circ\text{C}^{-1}\), then the current through the wire at \(0^\circ\text{C}\) is
When two resistors are connected in the two gaps of a meter bridge, the balancing point is obtained at \(25\,\text{cm}\) from the left end of the bridge wire. When a \(48\,\Omega\) resistor is connected in series to the smaller of the two resistors, the balancing point is obtained at \(75\,\text{cm}\) from the left end of the bridge wire. Then the initial values of the resistors connected in the left and right gaps of the bridge respectively are
Two metallic shells \(A\) and \(B\) of radii \(3\,\text{cm}\) and \(4\,\text{cm}\) are given electric charges \(20\,\mu\text{C}\) and \(40\,\mu\text{C}\) respectively. If the shells are arranged concentrically, then the ratio of the surface charge densities of the shells \(A\) and \(B\) is
The ratio of the energies stored in capacitors \(A\), \(B\) and \(C\) when connected in parallel to a dc supply is \(1:2:3\). When they are connected in series to the same dc supply, if the energy stored in capacitor \(C\) is \(75\,\text{mJ}\), then the energy stored in capacitor \(A\) is
If mass \(M\), pressure \(P\) and velocity \(V\) are taken as fundamental quantities, then the dimensional formula of surface tension is
Three logic gates are connected as shown in the figure. If the inputs are A=1, B=0 and C=1, then the values of \(y_1, y_2\) and \(y_3\) respectively are
At absolute zero temperature, a semiconductor behaves like
A parallel plate capacitor of capacitance 10 \(\mu\)F is charged by a 220 V supply. The capacitor is then disconnected from the supply and is connected to another uncharged parallel plate capacitor of capacitance 12 \(\mu\)F. The loss of electrostatic energy in this process is
The electric field due to an infinitely long thin straight wire with uniform linear charge density of \(2.5 \times 10^{-7}\) Cm\(^{-1}\) at a radial distance of x from the wire is \(7.5 \times 10^4\) NC\(^{-1}\). Then x =
When the right gap of a meter bridge consists of two equal resistors in series, the balancing point is at 50 cm. When one of the resistors in the right gap is removed and is connected in parallel to the resistor in the left gap, the balancing point is at
In a potentiometer experiment, a wire of length 10 m and resistance $5\,\Omega$ is connected to a cell of emf 2.2 V. If the potential difference between two points separated by a distance of 660 cm on potentiometer wire is 1.1 V, then the internal resistance of the cell is
A charge q is placed at the centre 'O' of a circle of radius R and two other charges q and q are placed at the ends of the diameter AB of the circle. The work done to move the charge at point B along the circumference of the circle to a point C as shown in the figure is
An electron and a positron enter a uniform electric field E perpendicular to it with equal speeds at the same time. The distance of separation between them in the direction of the field after a time 't' is
($\frac{e}{m}$ is specific charge of electron)
If L and C are inductance and capacitance respectively, then the dimensional formula of $(LC)^{-\frac{1}{2}}$ is
Six logic gates are connected as shown in the figure. The values of \( y_1, y_2 \) and \( y_3 \) respectively are
A thin spherical shell of radius R and surface charge density \( \sigma \) is placed in a cube of side 5R with their centers coinciding. The electric flux through one face of the cube is (\( \epsilon_o \) = Permittivity of free space)
The power gain and voltage gain of a transistor connected in common emitter configuration are 1800 and 60 respectively. If the change in the emitter current is 0.62 mA, then the change in the collector current is
As shown in the figure, a dielectric of constant K is placed between the plates of a parallel plate capacitor and is charged to a potential V using a battery. If the dielectric is pulled out after disconnecting the battery from the capacitor, the final potential difference across the plates of the capacitor is