What is Current or Electric Current?

What is Current or Electric Current?

Current or electric current is flow or charge (electrons that are negatively charged) from one medium to another through a conductor medium like copper wire, aluminum wire, circuit, electric wiring etc.

What is the SI Unit of Current?

The SI unit of current isampere.

How is Electric Current Measured?

Electric current is measured using an ammeter.

Types of Electric Current

Electric current is of 2 types – AC or Alternating Current and DC or Direct Current.

What is DC Current?

DC Current Symbol

DC or Direct Current is the flow of electric charge in one direction. This is called unidirectional flow of electric charge. DC current is produced by devices like battery, thermocouple, solar cell, dynamo etc. DC current is also called galvanic current.

AC Current Symbol

What is AC Current?

AC or Alternate Current is the flow of electric charge that periodically reverses direction in a waveform.

Current in Mobile Phone

The circuit of a mobile phone PCB works on DC current. The battery provides DC current to the circuit.

Principle of SMD Transformer

Principle of SMD Transformer

A magnetic field is generated around the coil when current flows through a coil. When AC supply is given to a coil, the intensity of magnetic field keeps on varying between minimum to maximum because in AC positive and negative half cycle are produced alternately. If another coil is placed within the magnetic field of the first coil, voltage is generated in the second coil also. The component made on this principle is called transformer. Two coils are placed near each other where one coil in neutralized by placing the magnetic field of the other coil. Mostly both the coils are encircled one below the other. The conductor wires used in the coils are insulated with fine insulating material to prevent short circuit.

SMD Transformer

What is the Graphical Symbol of Transformer? 

The Graphical Symbol of Transformer is:

Which character or alphabet indicates a Transformer?

Transformer is indicated by the alphabet T

What is the Work of a Transformer?

The main function of a Transformer is increase or decrease AC voltage.

What is the Unit of Transformer?

The Unit of Transformer is Volt Ampere.

Step Down Transformer

When the voltage of the input of the secondary winding or coil is lower than the input given in the first winding, it is called step down transformer.

Step Up Transformer

When the voltage of the output of the secondary winding or coil is higher that the input given in the first winding, it is called step up transformer.

How to Check Transformer?

Resistance should be checked when primary and secondary coils are checked separately. If only 1 is displayed, it means that the coil is OPEN. If beep sound or reading is received in one wire each of primary and secondary coil, it means the transformer is short.

Electronic Components are of 2 types: Passive and Active

Electronic Components are of 2 types: Passive and Active

Passive electronic components are those that do not have gain or directionality. They are also called Electrical elements or electrical components. e.g. resistors, capacitors, diodes, Inductors.

Active components are those that have gain or directionality.

e.g. transistors, integrated circuits or ICs, logic gates.
 

Active Electronic Components Resistor Capacitor   Diode   Inductor

Passive Electronic Components
Junction field effect transistor	Metal oxide field effect transistor (MOSFET)	Bipolar Transistor	Operational amplifier	Logic gates

Here are some of the Electronic Components and their functions in electronics and electrical:

1. Terminals and Connectors: Components to make electrical connection.

2. Resistors: Components used to resist current.

3. Switches: Components that may be made to either conduct (closed) or not (open).

4. Capacitors: Components that store electrical charge in an electrical field.

5. Magnetic or Inductive Components: These are Electrical components that use magnetism.

6. Network Components: Components that use more than 1 type of Passive Component.
7. Piezoelectric devices, crystals, resonators: Passive components that use piezoelectric. effect.

8. Semiconductors: Electronic control components with no moving parts.
9. Diodes: Components that conduct electricity in only one direction.

10. Transistors: A semiconductor device capable of amplification.
11. Integrated Circuits or ICs: A microelectronic computer circuit incorporated into a chip or semiconductor; a whole system rather than a single component.

What is Current or Electric Current?

What is Current or Electric Current?

Current or electric current is flow or charge (electrons that are negatively charged) from one medium to another through a conductor medium like copper wire, aluminum wire, circuit, electric wiring etc.

What is the SI Unit of Current?

The SI unit of current is ampere.

How is Electric Current Measured?

Electric current is measured using an ammeter.

Types of Electric Current

Electric current is of 2 types – AC or Alternating Current and DC or Direct Current.

What is DC Current?

DC Current Symbol

DC or Direct Current is the flow of electric charge in one direction. This is called unidirectional flow of electric charge. DC current is produced by devices like battery, thermocouple, solar cell, dynamo etc. DC current is also called galvanic current.

 

AC Current Symbol

What is AC Current?

AC or Alternate Current is the flow of electric charge that periodically reverses direction in a waveform.

Current in Mobile Phone

The circuit of a mobile phone PCB works on DC current. The battery provides DC current to the circuit.