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Due to motion of charge , its magnitude
Induction precedes attraction because
A soap bubble is given a negative charge , then its radius
The coulomb electrostatic force is defined for
The law, governing the force between electric charges is known as
Two identical metallic spheres A and B of exactly equal masses are given equal positive and negative charges respectively.
A body can be negatively charged by
The electric field at a point on equatorial line of a dipole and direction of the dipole moment
The pair of particles which have same acceleration in a uniform electric field is
An electron enters an electric field with its velocity in the direction of the electric lines of force.Then
Identify incorrect for electric charge q
The wrong statement about electric lines of force is
Electric lines of force always leave an equipotential surface
An electric dipole kept in uniform electric field experiences
Two electrons separated by distance ‘ r ‘ experience a force F between them. The force between a proton and singly ionized helium atom separated by distance 2r is
Two charges of equal magnitude and at a distance r exert a force F on each other. If the charges are halved and distance between them is doubled , then the new force acting on each charge is
Two positive charges separated by a distance of 2 m exert a force of 0.36 N. If the combined charge is 26 micro coulombs the charges are ( in micro coulombs )
The force between two similar charges of magnitude 2 C each separated by a distance 2 Km
The electric charge of 1 micro coulomb , -1 micro coulomb and 2 micro coulomb are placed in air at the corners A,B and C respectively of an equilateral triangle ABC having length of each side 10 cm. The resultant force on the charge at C is
The Two charges (+2 coulomb, –2 coulomb) are placed at a distance 0.5 m. Their dipole moment will be
Four different shaped metallic conductors are charged and mounted on insulating stands. Which of the following is the best suited shape to retain the charges for a longer time?