Electric Potential and Potential Difference

What do you mean by free electrons?

Metals are good conductors due to the presence of free electrons.

Discuss the role of free electrons in conduction of electricity.

The electrons moving in a specified direction when the ends of the conductor are connected to the battery, are accelerated continuously.

Why do electrons move in a specified direction when the ends of the conductor are connected to the battery? 

The flow of electrons is from the positive terminal to the negative terminal.

What happens to the motion of electrons when the ends of the conductor are connected to the battery? 

In the absence of a battery,

The net charge moving along a conductor through any cross-section is _____ when the conductor is in open circuit.

What happens to the motion of the electrons in an open circuit?

Mention the factor that maintains the flow of charge through a conductor.
(List: Resistance, Voltmeter, Ammeter, Current, potential difference)

Volt is a unit of:

Define electric potential and potential difference.

The potential difference between two points if $5 \mathrm{J}$ of work is done in moving a charge of $2 \mathrm{mC}$ from one point to another is $k\times {10}^3 \mathrm{volts}$. What is the value of $k$?

Find the electric potential (in volt) of a point if$2 \mathrm{J}$of work is done in bringing a charge of $0.2 \mathrm{C}$ from infinity to that point.

(Choose from:$10 /20 / 0.1 /0.2$ )

Connecting a battery in a circuit induces the flow of current because the battery provides the necessary _____ difference.