Question

what is direct current and alternating current​

Answer 1

Answer:

Alternating Current (AC) is a type of electrical current, in which the direction of the flow of electrons switches back and forth at regular intervals or cycles.

Direct current (DC) is electrical current which flows consistently in one direction

Answer 2

Electric Current

• The flow of charge in a particular direction is called electric current.

• Mathematically,

It is defined as the rate of flow of charge.

or

It is charge flowing per unit time through any cross-section of a conductor.

• It is denoted by 'I'.

$\longrightarrow\pink{\boxed{\bf{I=\dfrac{Q}{t}}}}$

where,

Q is flowing charge

t is time taken

• Its S.I. unit is C/s or A
• It is a fundamental physical quantity.
• It is of two types-

i) Steady or Direct Current(DC)

The current whose magnitude remains constant with time is called direct current.

ii) Variable or Alternating Current(AC)

The current whose magnitude changes with time and direction reverses periodically is called alternating current.