Question

What can be written in introduction on the topic 'Current Electricity' ?
Please give me the introduction in almost 100 words(10th ICSE).....
Please fastt.....No spam answers

Answer 1

Introduction

We know that atoms are made up of protons, electrons and neutrons. Protons and Neutrons are placed at the center of the atom which is called the Nucleus. Electrons moves around the nucleus. These electrons possess some energy. Neutrons does not have any charge and protons are positively charged. Electrons are negatively charged. Electrons circles the nucleus as opposite charges (protons and electrons) attract each other. The electrons moves from one atom to another. Thus electricity is produced when protons and electrons interact each other. It is mainly the flow of electrons. Electricity is of two forms –  Static Electricityand Current Electricity.

 Atoms in a conductor consists of free electrons that moves gently between the atoms. The movement of these electrons in the atoms are irregular and undirected. This means that there is no flow in any particular direction. When we apply voltage to the conductor these free electrons moves in the same direction and thus creates current. So current is the flow of electrons, the charged particles through a conducting medium.

Answer 2

Hi Avaniiii.......!!!!!!
Your question ia excellent.....!!!!!!

TOPIC :- CURRENT ELECTRICITY

● ELECTRIC CURRENT MEANING :-
Electricity is the rate of flow of electric charge through an electric device or electric circuit. It is denoted by the letter (I).

Now, I (Current) = Q (Charge) / t (time)

● UNIT OF ELECTRIC CURRENT :-
The unit of electric current is Ampere (A).

● REPRESENTATION OF AMPERE :-
1 ampere = 1 coulomb / 1 second

● Relation between current, number of electrons flowing through an electric circuit
and Time :-

We know I = Q / t
If n electrons flow through a circuit such that charge on each electron is e, then :
Q = ne
So, I = ne/t

● SCALAR OR VECTOR - CURRENT ?
Current is a scalar quantity.

● DIRECTION OF CURRENT :-

Current always flow from positive to negative terminal of a battery.

● POTENTIAL DIFFERENCE :-
◆ Definition : The amount of work done in moving a unit positive charge from one point to another point in an electric field is called potential difference.
◆ Formula :
1) Potential difference = Work / Charge
V (potential difference) = W (work done) / Q (charge)
2) Unit : Potential difference is measured in volts.

● ELECTRIC CONDUCTOR :