List of top Physics Questions on Electromagnetism asked in TS EAMCET

The electric potential at a region in terms of the coordinates \((x,y,z)\) in metre is

\[ V(x,y,z)=\left(10-3x^2-y^2-1.5z^2\right)\times10^6\ \text{V}. \]
The magnitude of the electric force acting on a charge of \(2\,\mu\text{C}\) placed at the point \((1,1,3)\,\text{cm}\) is

If the height of a transmitting antenna is \(45\,\mathrm{m}\) and the height of the receiving antenna is \(H\), then the maximum line-of-sight distance between the two antennas is \(1\%\) of the radius of the earth. If the radius of the earth is \(6400\,\mathrm{km}\), then the value of \(H\) is

For a coil rotating in a uniform magnetic field, the phase difference between the magnetic flux linked with the coil and the current induced in it is

If \(E\) and \(B\) are the magnitudes of the electric and magnetic fields respectively of a plane electromagnetic wave and \(\omega\) is its angular frequency, then the wavelength of the wave is

An electric dipole of length \(4\,\mathrm{cm}\) is placed in a uniform electric field of intensity \(2\times10^5\,\mathrm{N\,C^{-1}}\). When the dipole is oriented at a certain angle with the electric field, it experiences a torque of \(0.2\sqrt3\,\mathrm{N\,m}\) and possesses a potential energy of \(-0.2\,\mathrm{J}\). The magnitude of each charge of the dipole is

A potentiometer of length \(4\,\mathrm{m}\) and resistance \(20\,\Omega\) is connected in series to a resistor of resistance \(28\,\Omega\). If the emf of the cell is \(5\,\mathrm{V}\) and its internal resistance is \(2\,\Omega\), then the maximum potential difference that the potentiometer measures is