Ten questions. The result tells you which lessons you may skip.
A body carries a charge of \(-1.6\,\mu\text{C}\). Take \(e = 1.6 \times 10^{-19}\,\text{C}\). The body has
A neutral metal sphere is charged by induction with a negatively charged rod. The charge it keeps is
Two point charges \(2\,\mu\text{C}\) and \(8\,\mu\text{C}\) are \(40\,\text{cm}\) apart in air. Take \(k = 9 \times 10^9\,\text{N m}^2/\text{C}^2\). The force between them is
Two charges attract with \(1.2\,\text{N}\) in air. At the same distance in oil of dielectric constant 3, the force is
Charges \(+9\,\mu\text{C}\) and \(+1\,\mu\text{C}\) are \(40\,\text{cm}\) apart. A third charge feels no force on the line between them at
Six equal charges sit at the corners of a regular hexagon. One is removed. The force on a charge at the centre
A charge of \(-2\,\mu\text{C}\) placed in a field of \(3000\,\text{N/C}\) along \(+x\) feels a force of
Which statement about electrostatic field lines is false?
A very long straight wire carries \(\lambda\) per metre. At distance \(r\) from it the field is
The field on the axis of a uniformly charged ring of radius \(R\) is greatest at a distance from the centre of