What is current and types of current?

Answer 1

Wow, this could take all day depending on how deep you want to go!

Current is the 'Juice' that flows through an electrical circuit. Current has been compared to water for explanation purposes. Voltage is the pressure that a system has, and current is the amount of water that flows through the system.

A water tower is 100ft above the ground. Let's say that it has 100ft of pressure. This would be analogous to the potential difference (voltage). Water can flow through the pipes at 10 gallons per minute, in Electro-Speak; this would be the current (amps, amperage), particles of electricy per time unit, (particles/sec, particles/millisecond, etc.).

In your house you have a lamp that operates a 120 Volts AC (alternating current, as opposed to DC - Direct Current like that in your car battery).

The lamp is 120 watts (for ex.) therefore according to Ohm's law, the First Commandment of Electricity), the lamp draws 1 amp.

Current (I) = Power (watts)/Voltage,

Therefore 10 120w lamps = 1200 watts (like a hair dryer) draws 10 amps,

a 60-watt lamp bulb would draw half an amp (0.5a).

Current is also X# Coulombs per second, a coulomb is (whole bunch) of Joules/second. A Joule is a tiny particle of energy.

Answer 2

The flow of charge carriers is called current...there are many types called drift current,diffusion current,conventional current........in semi conductor devices....

but normally it is of 2 types based on their movement....

1.Alternating current

2.Direct current

Answer 3

Definition of Current: Current is a flow of electrons ( Negative charge ).

Examples of Current: Though current can not be seen and it only can be feel ( Touch/ Sense ), arc welding is may be a good example of current. ( Lightning surge in the sky may also an example of current! ). However, as i said earlier, current can not be seen and it only can be sense, with the help of tester, we can sense the current in phase terminal of plug. current is measured in ampere. To understand the phenomena of current, battery is a good example. When battery is connected, the electrons in the conductor are attracted towards the positive terminal of the battery as the charge of electrons is negative. These many numbers of electrons from the conductor, enter to the battery through positive terminal and this flow of electrons or say negative charge, known as current. ( Electric current can be compared with the flow of water through a pipe. Just as water flows through a pipe, electrons or say negative charge or say current flow through the conductor ).

Current Source: cell, battery, generator etc are the source of current.