Conservation and quantisation of charge, Coulomb's law, electric field due to point charges and dipoles, Gauss's law and applications.
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Q1 · Electric Charge and Electric Field · EASY
Two point charges of +3 μC and +3 μC are separated by a distance of 10 cm in air. What is the nature of the force between them?
Q2 · Electric Charge and Electric Field · MEDIUM
A charge of 4 μC is placed at the center of a square of side 20 cm. What is the electric flux through one face of a cube of side 20 cm with the charge at its center?
Q3 · Electric Charge and Electric Field · HARD
An electric dipole of moment 4 × 10⁻⁹ C m is placed in a uniform electric field of 10⁵ N/C making an angle of 30° with the direction of the field. What is the torque acting on the dipole?
Q4 · Electric Charge and Electric Field · EASY
The unit of electric field intensity is: