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List of top Physics Questions on Electric Charge

Three charges \( +q \) are placed at the corners of an equilateral triangle of side \( a \). What would be the total electrostatic potential energy (in terms of \( k \))?
\( I_g = 8\% \times I \). What is \( S \) (shunt) connected in terms of \( G \)?
Eight equal drops of water are falling through air with a steady speed of \( 10 \, \text{cm/s} \). If the drops coalesce, the new velocity is:
In an unbiased \( p\)-\( n \) junction, electrons diffuse from \( n\)-region to \( p\)-region because:
An ice cube has a bubble inside. When viewed from one side, the apparent distance of the bubble is \( 12 \, \text{cm} \). When viewed from the opposite side, the apparent distance of the bubble is \( 4 \, \text{cm} \). If the side of the ice cube is \( 24 \, \text{cm} \), the refractive index of the ice cube is:
A proton, an electron, and an alpha particle have the same energies. Their de-Broglie wavelengths will be compared as:
Relative permittivity and permeability of a material are \( \varepsilon_r \) and \( \mu_r \), respectively. Which of the following values of these quantities are allowed for a diamagnetic material?
A current of \( 200 \, \mu\text{A} \) deflects the coil of a moving coil galvanometer through \( 60^\circ \). The current to cause deflection through \( \frac{\pi}{10} \, \text{radian} \) is:
Force between two point charges \( q_1 \) and \( q_2 \) placed in vacuum at a distance \( r \, \text{cm} \) apart is \( F \). Force between them when placed in a medium having dielectric \( K = 5 \) at \( r/5 \, \text{cm} \) apart will be:
In a parallel combination of resistors, given the voltage, find the current flowing through the circuit.