Basic Electricity

Electricity

We use electricity to transfer energy from one place to another.
The energy is carried by electric current which flow through cable
(APP: from power station to homes)

In a simple circuit (Diagram: battery, bulb), the battery transfer energy to the chargee, and keeps it circulating round the circuit. The bulb transfer energy to the surroundings as heat and light.

Electric Current

Electric current is a flow of electric charges. The lamp lights because charged particles are moving through it.

Q:Why the ammeter is connected in series with other circuit element?

Current is measured by ammeter. Ammeter is placed in the circuit so that electrons pass through it.

Electric current is defined as the rate on charge flow (Q/t).
Meaning, the more electrons (Q) that pass the ammeter in one second(t), the higher the current.

[Without battery in the circuit]
- A copper wire consists of copper atoms and free electrons. All metals have a structure like this.

[With battery in the circuit/ battery is attached to the copper wire](Diagram:)
-The free electrons are attracted to the positive terminal. They all move slowly in the same direction through the wire with 'drift velocity'.

Diagram usually show the direction of 'conventional current' going from positive to negative.
Meanwhile, the electrons are flowing the opposite way.

Conductor Vs Insulator

Good conductors are having millions of free electrons in just mm3 volume.

In an insulator, almost all the electrons are firmly fixed to their atoms.

Semiconductors are neither good conductors nor good insulators.

~ Mind my Language throughout the Writing, May it Benefits You ➽💕

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