Questions in Electrostatics

Select	Question
	Two particle of equal mass \[m\] and charge \[q\] are placed at a distance of 16 cm. They do not experience any force. The value of \[\frac{q}{m}\] is
	When a glass rod is rubbed with silk, it
	An electron is moving round the nucleus of a hydrogen atom in a circular orbit of radius r. The coulomb force \[\overrightarrow F \] between the two is (Where \[K = \frac{1}{{4\pi {\varepsilon _0}}}\])
	A body has – 80 micro coulomb of charge. Number of additional electrons in it will be
	Two point charges placed at a certain distance r in air exert a force F on each other. Then the distance ‘r' at which these charges will exert the same force in a medium of dielectric constant k is given by
	Dielectric constant for metal is
	A charge of Q coulomb is placed on a solid piece of metal of irregular shape. The charge will distribute itself
	Five balls numbered 1 to 5 are suspended using separate threads. Pairs (1, 2), (2, 4) and (4, 1) show electrostatic attraction, while pair (2, 3) and (4, 5) show repulsion. Therefore ball 1 must be
	Equal charges \[q\] are placed at the four corners \[A,\,B,\,C,\,D\] of a square of length \[a\]. The magnitude of the force on the charge at B will be
	Two identical conductors of copper and aluminium are placed in an identical electric fields. The magnitude of induced charge in the aluminium will be