Electrostatics Quiz

Electrostatic potential at a point is defined as:

• Work done per unit charge in moving the charge from infinity to that point

• Work done per unit mass in bringing it from infinity

• Electric field at that point

• Potential energy per unit mass

The SI unit of electrostatic potential is:

• Volt

• Joule

• Coulomb

• Newton

The electrostatic potential due to a point charge Q at a distance r is:

• $\frac{1}{4\pi \epsilon_0} \cdot \frac{Q}{r^2}$

• $\frac{1}{4\pi \epsilon_0} \cdot \frac{Q}{r}$

• $\frac{Q}{r^2}$

• $\frac{Q}{4\pi \epsilon_0} \cdot r$

Which of the following is a conservative force?

• Magnetic force

• Electrostatic force

• Friction

• Viscous force

Work done in moving a charge between two points in an electric field depends on:

• The path taken

• The direction of movement

• The initial and final points only

• The shape of the field lines

In an equipotential surface, the electric field is:

• Tangent to the surface

• Parallel to the surface

• Normal to the surface

• Zero

The potential energy of a dipole in a uniform electric field is minimum when:

• Dipole is perpendicular to the field

• Dipole is aligned opposite to the field

• Dipole is aligned with the field

• Dipole is at 45° to the field

Unit of electric field intensity is:

• Volt

• Newton

• Volt/meter

• Joule

What is the potential energy of a charge $q$ at a point where the potential is $V$?

• $V/q$

• $q/V$

• $qV$

• $q^2V$

Electric potential inside a conductor is:

• Zero

• Infinite

• Constant

• Variable